openresty / lua-resty-upload

Streaming reader and parser for http file uploading based on ngx_lua cosocket

Name

OpenResty - Turning Nginx into a Full-Fledged Scriptable Web Platform

Table of Contents

• Name
• Description
  • For Users
  • For Bundle Maintainers
• Additional Features
  • resolv.conf parsing
• Mailing List
• Report Bugs
• Copyright & License

Description

OpenResty is a full-fledged web application server by bundling the standard nginx core, lots of 3rd-party nginx modules, as well as most of their external dependencies.

This bundle is maintained by Yichun Zhang (agentzh).

Because most of the nginx modules are developed by the bundle maintainers, it can ensure that all these modules are played well together.

The bundled software components are copyrighted by the respective copyright holders.

The homepage for this project is on openresty.org.

For Users

Visit the download page on the openresty.org web site to download the latest bundle tarball, and follow the installation instructions in the installation page.

For Bundle Maintainers

The bundle's source is at the following git repository:

https://github.com/openresty/openresty

To reproduce the bundle tarball, just do

make

at the top of the bundle source tree.

Please note that you may need to install some extra dependencies, like perl, dos2unix, and mercurial. On Fedora 22, for example, installing the dependencies is as simple as running the following commands:

sudo dnf install perl dos2unix mercurial

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Additional Features

In additional to the standard nginx core features, this bundle also supports the following:

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resolv.conf parsing

syntax: resolver address ... [valid=time] [ipv6=on|off] [local=on|off|path]

default: -

context: http, stream, server, location

Similar to the resolver directive in standard nginx core with additional support for parsing additional resolvers from the resolv.conf file format.

When local=on, the standard path of /etc/resolv.conf will be used. You may also specify arbitrary path to be used for parsing, for example: local=/tmp/test.conf.

When local=off, parsing will be disabled (this is the default).

This feature is not available on Windows platforms.

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Mailing List

You're very welcome to join the English OpenResty mailing list hosted on Google Groups:

https://groups.google.com/group/openresty-en

The Chinese mailing list is here:

https://groups.google.com/group/openresty

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Report Bugs

You're very welcome to report issues on GitHub:

https://github.com/openresty/openresty/issues

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Copyright & License

The bundle itself is licensed under the 2-clause BSD license.

Copyright (c) 2011-2019, Yichun "agentzh" Zhang (章亦春) [email protected], OpenResty Inc.

This module is licensed under the terms of the BSD license.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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lua-resty-upload's Issues

Support optional compatibility to LF as line break

Many (if not all) mainstream web servers, Apache(mod_upload) and Nginx(upload module) for instance are compatible to request use LF as line break:

https://github.com/Austinb/nginx-upload-module/blob/2.2/ngx_http_upload_module.c#L4123
https://github.com/Austinb/nginx-upload-module/blob/2.2/ngx_http_upload_module.c#L4051
http://apache.webthing.com/mod_upload/mod_upload.c L304

Would it be necessary for the resty-upload module to support this too? Maybe an optional feature and closed by default?

To illustrate when it matters, if a WAF may want to filter multipart forms and use lua-resty-upload, where a malicious request can bypass its check for headers:

POST /submit.php HTTP/1.1
Host: target.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary6GpaBUxso7BnIrnA
Headers-Dont-Matter: it doesnt matter

------WebKitFormBoundary6GpaBUxso7BnIrnA
Content-Type: text/plain
Content-Disposition: form-data; name="something"; filename="doesnt_matter"

[LF rather than CRLF this line]
------WebKitFormBoundary6GpaBUxso7BnIrnA[LF rather than CRLF this line]
Content-Disposition: form-data; name="webshell.php"

malicious script here
------WebKitFormBoundary6GpaBUxso7BnIrnA--

from WAF's point of view, below is a single line:

[LF rather than CRLF this line]
------WebKitFormBoundary6GpaBUxso7BnIrnA[LF rather than CRLF this line]
Content-Disposition: form-data; name="webshell.php"

therefore the boundary is missing and the second uploaded file(including its headers) is seen as part of the first file's body, and the protected server still sees it as two files.

We can make up more methods to bypass WAF based on this.

If request has parameter, 2 files are created during upload

I have a client code in python:

        data = {"report_type": self.type}
        files = {"logfile": (self.name, open(self.data_path, 'rb'))}
        try:
            r = requests.post(self.url, files=files, headers = headers, data = data, timeout = 180)
        except Exception as e:
            error("Failed to upload file %s: %s" % (self.data_path, str(e)))
            return False

My lua code is following:

while true do
    local typ, res, err = form:read()
    if not typ then
        ngx.say("failed to read: ", err)
        return
    end

    if typ == "header" then
        local file_name = gen_file_name(location, report_type, get_report_host())
        if file_name then
            file = io.open(file_name, "w+")
            if not file then
                ngx.say("failed to open file ", file_name)
                return
            end
        end

    elseif typ == "body" then
        if file then
            file:write(res)
        end

    elseif typ == "part_end" then
        file:close()
        file = nil

    elseif typ == "eof" then
        break

    else
        -- do nothing
    end
end

It creates 2 files instead of 1:

1. actual file
2. file with value of report_type request parameter.

How can avoid creating of the second file with request parameter?

Problem with big file upload: Request Entity too large

I'm trying to upload a slightly big file of size ~3MB. And I'm getting a 413 error. The nginx error is:

2016/08/24 21:35:05 [error] 50785#0: *2 client intended to send too large body: 3520276 bytes, client: 127.0.0.1, server: localhost, request: "POST /test HTTP/1.1", host: "localhost:8070".

And my client side error:

<title>413 Request Entity Too Large</title>

413 Request Entity Too Large

---

openresty/1.9.15.1

Is there any configuration I need to do on the Nginx side?

is chunked request bodies supported?

I'm developing a file server with openresty, the client is a java program which upload the file with stream so that not too much memory used , but I get the error "chunked request bodies not supported yet", so I want to know does lua_resty_upload support chunked request bodies? if not, is there any suggest to handle this, thanks.

New style of boundary parsing

I wrote yesterday PHP class to parse multipart request body. For example Chrome sent boundary before headers not in Content-Type header.

Is it possible to make update to handle those changes?

一个小建议

local key, value = string.match(line, "([^: \t]+)%s*:%s*(.+)")
if not key then
    return 'header', line
end

return 'header', {key, value}
是否可以将string.match(line, "([^: \t]+)%s*:%s*(.+)")解析的部分包装成一个函数。

而原始的read_header函数直接返回 'header', line，因为有些场景情况下需要用到line，而现在我没办法知道line的原始数据是什么

Biblioteca jose do python não chama a função jwt

cjson not found, falling back to stdlib json
Traceback (most recent call last):
File "c:\INTEGRACAO-QI-TECH\5_2_3_CONTRATO_DE_CESSAO\5_2_3_1.py", line 3, in
from jose import jwt
ImportError: cannot import name 'jwt' from 'jose'

Este é o erro que estou enfrentando. Um problema do código da biblioteca. Como consertar?

form read size bigger than the real data length

here is the code

local upload    =   require "resty.upload"
local json      =   require "cjson"
local s3_upload =   require "resty.s3_upload"

local form, err = upload:new(chunk_size)
if not form then
    ngx.log(ngx.ERR, "failed to new upload: ", err)
    ngx.exit(500)
end

local timeOut       =   10000
form:set_timeout(timeOut) 

while true do
        local typ, res, err = form:read()
        if not typ then
            ngx.say(ngx.ERR,"failed to read: ", err)
            return
        end 

        if typ == "header" then 
            content_type    =   res[2]
            if content_type  == 'application/hta' then 
                    start_upload    =   true
            end 
            ngx.log(ngx.INFO,"content_type: ", content_type)

            ngx.log(ngx.INFO,"header: ", json.encode(res))

        elseif typ == "body" then
            if start_upload==true and res then
                appender    =   appender..res
            end

        elseif typ == "part_end" then 

            if appender ~= ''  then
                local data_len  =    string_len(appender)
                ngx.log(ngx.NOTICE,"start to upload ",content_type," len=" ,data_len)
                ## -- ERROR HERE  handle string appender 
                ## -- data_len  is   bigger than I expected when the chunk_size is 50*1024
                               ##  -- data_len  will bi right when I change the chunk_size as 10*1024 
                ## -- if I post a file in the form 
                ## -- the data_len appender will be 15 byte bigger than the file I posted

                appender        =   ''
                start_upload    =   false
            end 

    elseif typ == "eof" then
         break 
    end 
end 

MAX_LINE_SIZE, 512 is too small in Korean

One Korean character is 3-byte in UTF-8. And MS Windows limits a single path to 260 characters.
Therefore maximum Korean caharacter path or filename length is about 780 bytes in UTF-8.

local MAX_LINE_SIZE = 512

MAX_LINE_SIZE, 512 is too small to contain max Korean character filename.

How about increase the size MAX_LINE_SIZE to 1024?

Thank you.

Got "closed" error after call read method of resty.upload

Hi, I encountered an occasional problem in a http request, the following is the sample code

local upload = require "resty.upload"
local form, err = upload.new(4 * 1024)

****

form:set_timeout(5000)

local typ, res, err = form:read()

The value of err is "closed", then server return a message(by using ngx.print and ngx.exit(ngx.HTTP_OK)) and client can receive it. It seems that the socket was closed but client can still get the return of server

has a bug on windows,Write a file will be more than one \ r in each line

when i use the mouble,i occured a probole.it will be more than one \r in each line.my lua script:

package.path = 'E:/nginx-windows/lua/?.lua;E:/nginx-windows/resty/?.lua;'
package.cpath = 'E:/nginx-windows/?.dll;'
  
local restyUpload = require "upload"  
  
local chunk_size = 4096  
 
local file  
local filelen=0  
local filename
local args = ngx.req.get_query_args()  
--ngx.say(args) 
function get_filename(res)  
    local filename = ngx.re.match(res,'(.+)filename="(.+)"(.*)')  
    if filename then   
        return filename[2]  
    end  
end  
  
local rootDir = "e:/temp/"  
local filepath = rootDir .. "/" --args.path .. 
local temp = io.open(filepath)

local form = restyUpload:new(chunk_size)
if form == nil then
    ngx.log(ngx.ALERT, "parse body failed.")
	ngx.exit(500)
end

form:set_timeout(0) -- 1 sec  
local i=0  
ngx.header.content_type = "text/plain"
while true do  
    local typ, res, err = form:read()  
    if not typ then  
        ngx.say("failed to read body: ", err)  
        return  
    end
    if typ == "header" then  
        if res[1] ~= "Content-Type" then  
            filename = get_filename(res[2])  
            if filename then  
                i=i+1  
                filepath = filepath .. filename  
                file = io.open(filepath,"w+")  
                if not file then
					ngx.exit(ngx.HTTP_INTERNAL_SERVER_ERROR)
					ngx.log(ngx.ALERT, "can not open file: "..filepath)
                    return  
                end  
            end  
        end  
    elseif typ == "body" then 
		ngx.say("type", res);
        if file then  
            --filelen= filelen + tonumber(string.len(res))      
            file:write(res)
        end  
    elseif typ == "part_end" then  
        if file then  
            file:close()  
            file = nil
            ngx.say("success")  
        end  
    elseif typ == "eof" then  
        break  
    else  
    end  
end  
if i==0 then
	ngx.exit(ngx.HTTP_NOT_FOUND)	
	ngx.log(ngx.ALERT, "please upload at least one file!")
    return  
end

the response is:

type<html>
<body>
<form enctype="multipart/form-data" method="post"  action="http://localhost:8090/upload">
	<input type="file" name="file"/>
	<input type="submit" value="upload"/>
</form>

</body>

</html>
success

but,the file is:

<html>

<body>

<form enctype="multipart/form-data" method="post"  action="http://localhost:8090/upload">

	<input type="file" name="file"/>

	<input type="submit" value="upload"/>

</form>



</body>



</html>

so,when i try to use this script to upload image、zip、doc and other files ,all files are damage.and i found that not all files will damage,same file is right.

Subrequest question

Thank you for your work, i use this module without any problems for a year.
But now I tried to handle the upload with the same script, but from a subrequest, and i got this:

attempt to read the request body in a subrequest
stack traceback:
coroutine 0: > [C]: in function 'req_socket' > /usr/lib/lua/luarocks/share/lua/5.1/resty/upload.lua:61: in function 'new'

i called the script with this:

local res = ngx.location.capture("/upl_worker", {share_all_vars = true, always_forward_body=true})

Is it impossible, or i miss something?

Is the header duplicated

Hi, ChunGe!

I use the example code:

local upload = require "resty.upload"
local cjson = require "cjson"

local chunk_size = 8192 -- should be set to 4096 or 8192
                     -- for real-world settings

local form, err = upload:new(chunk_size)
if not form then
    ngx.log(ngx.ERR, "failed to new upload: ", err)
    ngx.exit(500)
end

form:set_timeout(1000) -- 1 sec

while true do
    local typ, res, err = form:read()
    if not typ then
        ngx.say("failed to read: ", err)
        return
    end

    ngx.say("read: ", cjson.encode({typ, res}))

    if typ == "eof" then
        break
    end
end

local typ, res, err = form:read()
ngx.say("read: ", cjson.encode({typ, res}))

the request raw is below:

POST http://api.31lancai.com/upload_lua HTTP/1.1
Host: api.31lancai.com
Connection: keep-alive
Content-Length: 301
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: http://www.31lancai.com
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryTOm33VnyDJkkXk8V
DNT: 1
Referer: http://www.31lancai.com/user_bank_card_cancel.html?index=97961
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.8,en;q=0.6,ja;q=0.4,zh-TW;q=0.2
Cookie: LC_UUID=79b77b68-ee66-4bdf-91ad-9766e81f1199; PHPSESSID=c5cdf77f848185b9d104ec3fe96ee7f8; LC_USER_LOGIN_TYPE=s; LC_LOGGED=1; LC_USER_ID=250402; LC_DISPLAY_NAME=%E5%93%88%E5%A5%B3%E5%A3%AB

------WebKitFormBoundaryTOm33VnyDJkkXk8V
Content-Disposition: form-data; name="data"

{"type":"photo_idcard"}
------WebKitFormBoundaryTOm33VnyDJkkXk8V
Content-Disposition: form-data; name="pic"; filename="test.jpg"
Content-Type: image/jpeg

321321
------WebKitFormBoundaryTOm33VnyDJkkXk8V--

the response is:

HTTP/1.1 200 OK
Server: nginx
Date: Tue, 29 Mar 2016 06:54:33 GMT
Content-Type: text/plain
Transfer-Encoding: chunked
Connection: keep-alive

74
read: ["header",["Content-Disposition","form-data; name=\"data\"","Content-Disposition: form-data; name=\"data\""]]

2d
read: ["body","{\"type\":\"photo_idcard\"}"]

13
read: ["part_end"]

a0
read: ["header",["Content-Disposition","form-data; name=\"pic\"; filename=\"test.jpg\"","Content-Disposition: form-data; name=\"pic\"; filename=\"test.jpg\""]]

4c
read: ["header",["Content-Type","image\/jpeg","Content-Type: image\/jpeg"]]

18
read: ["body","321321"]

13
read: ["part_end"]

e
read: ["eof"]

e
read: ["eof"]

0

you can seen that the header is dumplicated, like read: ["header",["Content-Disposition","form-data; name=\"pic\"; filename=\"test.jpg\"","Content-Disposition: form-data; name=\"pic\"; filename=\"test.jpg\""]], there is double "Content-Disposition", double "form-data; name=\"pic\"; filename=\"test.jpg\""

why? this is a bug? or I misunderstand?

lua tcp socket read timed out

hi,I use lua-resty-upload to handle big file upload, I use an extension of this version which have the part-split upload function, repos link, when the last part upload complete, the nginx error log sometimes show this error:
lua tcp socket read timed out
and did not merge all the part to one file,please give me a help!thx!
this is upload.lua script below:

local upload = require "resty.upload"
local cjson = require "cjson"
local get = ngx.req.get_uri_args()
local chunk_size = 4096
local file_upload_count = 0
local speed = 0
local post = {}
local index
local file
local upload_path = "/tmp/" -- 上传路径

--merge chunks
local function mergeChunks(chunks, name)
    local file = io.open(upload_path .. name, "w+")
    for i = 0, chunks - 1 do
        local chunk_path = upload_path .. name .. "." .. i
        local chunk_file = io.open(chunk_path)
        while true do
            local bytes = chunk_file:read(4096)
            if not bytes then
                break
            end
            file:write(bytes) 
        end
        chunk_file:close()
        os.remove(chunk_path)
    end
    file:close()
end

-- rate limit
if get.speed then
    speed = math.ceil(get.speed * 1024 / chunk_size)
end

local form, err = upload:new(chunk_size)
if not form then
    ngx.say("no zuo no die.")
    ngx.exit(200)
end

form:set_timeout(1000) -- one second timeout

while true do
    local typ, res, err = form:read()
    if not typ then
        ngx.say("failed to read: ", err)
        return
    end

    if typ == "header" then
        if res[1] == "Content-Disposition" then
            local filename = ngx.re.match(res[2], '(.+)filename="(.+)"(.*)')

            if filename then
                filename = filename[2]

                -- part upload
                if post["chunks"] then
                    filename = filename .. "." .. post["chunk"]
                end

                file = io.open(upload_path .. filename, "w+")
                if not file then
                    ngx.say("failed to open file ")
                    return
                end
            else
                local name = ngx.re.match(res[2], '(.+)name="(.+)"(.*)')
                if name[2] then
                    index = name[2]
                end    
            end
        end
    elseif typ == "body" then
        if file then
            -- record upload times
            file_upload_count = file_upload_count + 1

            -- rate limit
            if speed ~= 0 and file_upload_count % speed == 0 then
                ngx.sleep(1)
            end

            -- write file
            file:write(res)
        else
            if index then
                if post[index] == nil then
                    post[index] = res
                else
                    post[index] = post[index] .. res
                end
            end
        end
    elseif typ == "part_end" then
        if file then
            file:close()
            file = nil

            if post["chunks"] and post["chunk"] then
                if tonumber(post["chunks"]) - tonumber(post["chunk"]) == 1 then
                    mergeChunks(tonumber(post["chunks"]), post["name"])
                end
            end

            ngx.header["Content-Type"] = 'application/json'
            ngx.say(cjson.encode({code=1}))
        end
        if index then
            index = nil
        end
    elseif typ == "eof" then
        break
    else

    end

end

error module 'cjson' not found

Hello, I'm trying to install two modules
https://github.com/openresty/lua-resty-upload
https://github.com/openresty/lua-resty-redis
on my test machine

nginx -V
nginx version: system-ns.com/LoadBalancer/0.0.1
built by gcc 7.3.1 20180130 (Red Hat 7.3.1-2) (GCC) 
built with OpenSSL 1.1.0g-fips  2 Nov 2017 (running with OpenSSL 1.1.0h-fips  27 Mar 2018)
TLS SNI support enabled
configure arguments: --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/tmp/client_body --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/run/nginx.pid --lock-path=/run/lock/subsys/nginx --user=nginx --group=nginx --with-file-aio --with-threads --with-ipv6 --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-http_addition_module --with-http_xslt_module --with-http_image_filter_module --with-http_geoip_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_stub_status_module --with-http_perl_module --with-mail --with-mail_ssl_module --with-pcre --with-stream --with-pcre-jit --add-module=../lua-nginx-module-0.10.13 --add-module=../nginx_upstream_check_module --add-module=../ngx_pagespeed-1.13.35.1-beta --add-module=../nginx-gridfs --add-module=../nginx-upstream-dynamic-servers --add-module=../nginx-module-vts --add-module=../nginx-push-stream-module --with-google_perftools_module --with-cc-opt='-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -D_GLIBCXX_USE_CXX11_ABI=0' --with-ld-opt='-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-E'

my config file nginx

lua_package_path "/opt/lua-resty-redis/lib/?.lua;/opt/lua-resty-upload/lib/?.lua;;";

server {
        server_name _;
        location /test {
            content_by_lua '
                local upload = require "resty.upload"
                local cjson = require "cjson"

                local chunk_size = 5 -- should be set to 4096 or 8192
                                     -- for real-world settings

                local form, err = upload:new(chunk_size)
                if not form then
                    ngx.log(ngx.ERR, "failed to new upload: ", err)
                    ngx.exit(500)
                end

                form:set_timeout(1000) -- 1 sec

                while true do
                    local typ, res, err = form:read()
                    if not typ then
                        ngx.say("failed to read: ", err)
                        return
                    end

                    ngx.say("read: ", cjson.encode({typ, res}))

                    if typ == "eof" then
                        break
                    end
                end

                local typ, res, err = form:read()
                ngx.say("read: ", cjson.encode({typ, res}))
            ';
        }
        location /redis {
            content_by_lua_block {
                local redis = require "resty.redis"
                local red = redis:new()

                red:set_timeout(1000) -- 1 sec

                -- or connect to a unix domain socket file listened
                -- by a redis server:
                --     local ok, err = red:connect("unix:/path/to/redis.sock")

                local ok, err = red:connect("127.0.0.1", 6379)
                if not ok then
                    ngx.say("failed to connect: ", err)
                    return
                end

                ok, err = red:set("dog", "an animal")
                if not ok then
                    ngx.say("failed to set dog: ", err)
                    return
                end

                ngx.say("set result: ", ok)

                local res, err = red:get("dog")
                if not res then
                    ngx.say("failed to get dog: ", err)
                    return
                end

                if res == ngx.null then
                    ngx.say("dog not found.")
                    return
                end

                ngx.say("dog: ", res)

                red:init_pipeline()
                red:set("cat", "Marry")
                red:set("horse", "Bob")
                red:get("cat")
                red:get("horse")
                local results, err = red:commit_pipeline()
                if not results then
                    ngx.say("failed to commit the pipelined requests: ", err)
                    return
                end

                for i, res in ipairs(results) do
                    if type(res) == "table" then
                        if res[1] == false then
                            ngx.say("failed to run command ", i, ": ", res[2])
                        else
                            -- process the table value
                        end
                    else
                        -- process the scalar value
                    end
                end

                -- put it into the connection pool of size 100,
                -- with 10 seconds max idle time
                local ok, err = red:set_keepalive(10000, 100)
                if not ok then
                    ngx.say("failed to set keepalive: ", err)
                    return
                end

                -- or just close the connection right away:
                -- local ok, err = red:close()
                -- if not ok then
                --     ngx.say("failed to close: ", err)
                --     return
                -- end
            }
        }
}

for a simple test I do

curl -I http://test.name/redis
HTTP/1.1 200 OK
Server: system-ns.com/LoadBalancer
Date: Thu, 13 Sep 2018 12:27:37 GMT
Content-Type: application/octet-stream
Connection: keep-alive

curl -I http://test.name/test
HTTP/1.1 500 Internal Server Error
Server: system-ns.com/LoadBalancer
Date: Thu, 13 Sep 2018 12:29:49 GMT
Content-Type: text/html
Content-Length: 186
Connection: close

and in the logs I get an error

*1 lua entry thread aborted: runtime error: content_by_lua(upload.conf:39):3: module 'cjson' not found:
        no field package.preload['cjson']
        no file '/opt/lua-resty-redis/lib/cjson.lua'
        no file '/opt/lua-resty-upload/lib/cjson.lua'
        no file './cjson.lua'
        no file '/usr/share/luajit-2.1.0-beta3/cjson.lua'
        no file '/usr/local/share/lua/5.1/cjson.lua'
        no file '/usr/local/share/lua/5.1/cjson/init.lua'
        no file '/usr/share/lua/5.1/cjson.lua'
        no file '/usr/share/lua/5.1/cjson/init.lua'
        no file './cjson.so'
        no file '/usr/local/lib/lua/5.1/cjson.so'
        no file '/usr/lib64/lua/5.1/cjson.so'
        no file '/usr/local/lib/lua/5.1/loadall.so'
stack traceback:
coroutine 0:
        [C]: in function 'require'
        content_by_lua(upload.conf:39):3: in function <content_by_lua(upload.conf:39):1>, client: my.ip, server: test.server.ip, request: "HEAD /test HTTP/1.1", host: "test.server.ip"

can not find the module cjson

what could be the problem?

If the uploaded file is a picture，I want it to be a 2048 by 2048 image with maximum height and width

while true do
	local typ, res, err = form:read()
	if not typ then
		ngx.say("failed to read: ", err)
		return
	end
	if typ == "header" then
		local key = res[1]
		local value = res[2]
		if key == "Content-Disposition" then
		local kvlist = string.split(value, ';')
			for _, kv in ipairs(kvlist) do
				local seg = string.trim(kv)
				if seg:find("filename") then
					local kvfile = string.split(seg, "=")
					local filename = string.sub(kvfile[2], 2, -2)
					if filename then
						ext = getExtension(filename)
						local now = os.date("%Y%m%d%H%M%S", os.time())
						local filename = now.."-"..string.sub(ngx.md5(now..user_cid), 0, 8)..ext
						local image_id = ""
						if string.find(uri, "/upload/photo") then
							uri = string.gsub(ngx.var.uri, '/upload/photo', "/bfs/g/"..filename)
							image_id = "/g/"..filename
						elseif string.find(uri, "/upload/voice") then
							uri = string.gsub(ngx.var.uri, '/upload/voice', "/bfs/v/"..filename)
						else 
							ngx.print(cjson.encode({code=404, message="Not Found"}))
							ngx.exit(404)
						end
						break
					end
				end
			end
		end
	--append body
	elseif typ == "body" then
		if res then
				appender = appender..res
		end
	--one file has been read
	elseif typ == "part_end" then
		if appender ~= '' then
			-- If the uploaded file is a picture，I want it to be a 2048 by 2048 image with maximum height and width
			code = upload2BFS(uri, data)

支持断点续传和分块传输吗？

支持断点续传和分块传输吗？

请求解决一下http v2 支持的问题

文件上传报错：
2020/12/22 18:15:39 [error] 2122#0: *12049 lua entry thread aborted: runtime error: /www/server/openresty/lualib/resty/upload.lua:60: http v2 not supported yet

cannot parse boundary

Hi:
When Content-Type is "xxxxxx;boundary=xxxxxxxx", lua-resty-upload cannot parse boundary. I find out """Content-Type := type "/" subtype *[";" parameter]""" in http://www.ietf.org/rfc/rfc1341.txt. Is necessary space between semicolon and parameter?

Best regards,
chenshu

the uploaded image is damaged

Hi,I use the upload component,and success to upload the image to special dir,but the image is damaged,I have no idear.

How to download folder content from nginx server

Hi, I have hosted an nginx server using resty docker base image. Have couple of endpoints expose
one to upload, download, list directory content. What ever files uploaded using upload link to directory need to be download all at once using download option.
With ngx.location.capture of the directory i get the list of files with in directory. How can I pass the file information and content over as http response?

Any help would really be appreciated. :)

Publish v0.10 on OPM

Pretty much as the title says. It'd be great to get v0.10 on OPM!

Headers doubled

I get headers like this:

["Content-Disposition","form-data; name=\"nick\"","Content-Disposition: form-data; name=\"nick\""]

While original request only had this:
`Content-Disposition: form-data; name="nick"``

It seems all the headers this returns are doubled? Is that what is expected?

plan for support http v2？

lua entry thread aborted: runtime error: /usr/local/openresty/lualib/resty/upload.lua:61: http v2 not supported yet

How to reconstruct body after upload

I'm trying to make an anti-virus middle ware which first check the uploaded files with help of lua-resty-upload and if they are not infected proxy_pass them to some dynamic proxy target.
I was able to handle the first part easily thanks to lua-resty-upload but the issue is when I proxy_pass the request after anti-virus check the body is empty. which seems pretty normal because lua-resty-upload has consumed the body already.
So I should reconstruct the body again after virus check, But I don't have the raw binary data of request at that point to easily reconstruct the body, all I have is parsed body which is hard to be converted to raw binary again.
Is there any shortcut method which can give me the raw binary data after process of lua-resty-upload is finished?

How to build a module to nginx?

I am trying to build a Docker image, unfortunately it is failing:

./configure: error: no ../lua-resty-upload-0.10/config was found
The command '/bin/sh -c ./configure --prefix=/usr/local/nginx   --add-module=../headers-more-nginx-module       --add-module=../ngx_http_auth_pam_module      --add-module=../ngx_cache_purge   --add-module=../dav-ext-module  --add-module=../ngx_devel_kit   --add-module=../echo-nginx-module      --add-module=../push-stream-module  --add-module=../lua-nginx-module   --add-module=../upload-progress-module   --add-module=../ngx-fancyindex  --add-module=../ngx_http_substitutions_filter_module    --add-module=../lua-resty-upload-0.10   --add-module=../ngx_aws_auth   --add-module=../set-misc-nginx-module   --add-module=../upload-module  --with-http_ssl_module         --with-http_addition_module         --with-http_dav_module         --with-http_geoip_module         --with-http_gzip_static_module         --with-http_image_filter_module         --with-http_perl_module         --with-http_random_index_module         --with-http_secure_link_module         --with-http_v2_module         --with-http_sub_module         --with-http_xslt_module         --with-mail         --with-mail_ssl_module  --with-file-aio    --with-threads    --with-cc-opt="-O3"' returned a non-zero code: 1

Does this support multiple upload?

Does this support the upload of bulk files? If this does not support, Can you give me a reference plz?

HTTPS upload?

This module works fine when I have upload via http. But when I used httpS it crashes on call upload:new(chunk_size) phase. Does exist method for working with httpS?

Iterator to work with generic for

I noticed that the only way to receive the data seems to be to manually iterate until 'eof' is returned.

I think it would make sense to add a more user-friendly method that works with Luas generic for loop to iterate over the data.

Here's an example implementation:

function _M.each(self)
  return function(self)
    local type, data, err = self:read()
    if not type then
      error(err, 2)
    elseif type == "eof" then
    else
      return type, data
    end
  end, self
end

Then the example of the readme could also be written as

for type, data in form:each() do
  ngx.say("read: ", cjson.encode{type, data}
end

Lose some data when use lua-resty-upload to write to a file.

When I upload a file via lua-resty-upload ,I find the lastest uploaded file always lose some data,but when I upload another file, the previous file seems ok,it seems something has been buffered and not flush to the disk immediately。

    local upload = require "resty.upload"
    local chunk_size = 8192
    local form = upload:new(chunk_size)
    local uuid = require("resty.uuid")
    local file
    local currenttime = os.time()
    local filename = uuid().."-"..pid
    local file_name = uploadpath..filename
    if form then
    while true do
        local typ, res, err = form:read()
        if not typ then
              ngx.say(cjson.encode({code=1,message="nofile upload"}))
             return
        end

            if file_name then
                file = io.open(file_name, "a+")
                if not file then
                    ngx.say(cjson.encode({code=2,message="file save failed"}))
                    return
                end
            end


         if typ == "body" then
            if file then
                file:write(res)
            end

        elseif typ == "part_end" then
            file:close()
            file = nil
            file_name = nil
            ngx.say(cjson.encode({code=0,url=ngx.var.scheme.."://"..ngx.var.host.."/"..filename}))
            filename = nil
            return

        elseif typ == "eof" then
            break

        else
            -- do nothing
        end

    end
    else
        ngx.say(cjson.encode({code=1,message="nofile upload"}))
        return
    end

I call file:flush() before file:colse() ,there is no effect

Attempt to index local 'form' (a nil value)

Hi,
I am following below code on fedora Linux with nginx:

        local resty_sha256 = require "resty.sha256"
        local upload = require "resty.upload"

        local chunk_size = 4096
        local form = upload:new(chunk_size)
        local sha256 = resty_sha256:new()
        local file

        local upload_path = '/tmp/uploads/'


        while true do
           local typ, res, err = form:read()

            if not typ then
                ngx.say("failed to read: ", err)
                return
            end

            if typ == "header" then
                local file_name = upload_path .. ngx.time()
                if file_name then
                    file = io.open(file_name, 'w+')
                    if not file then
                        ngx.say("failed to open file ", file_name)
                        return
                    end
                end
            elseif typ == "body" then
                if file then
                    file:write(res)
                    sha256:update(res)
                end
            elseif typ == "part_end" then
                file:close()
                file = nil
            elseif typ == "eof" then
                break
            else
                -- nothing
            end
        end

        local digest = sha256:final()
        sha256:reset()

        local str = require "resty.string"
        ngx.say("sha256: ", str.to_hex(digest))```

When I run this as

curl -F "[email protected]" http://127.0.0.1:8089/uploadtest

It gives me below errors:

$ tail -f /usr/local/openresty/nginx/logs/error.log 2016/06/29 15:26:23 [error] 31449#0: *12 lua entry thread aborted: runtime error: /usr/local/openresty/nginx/uploadtest.lua:13: attempt to index local 'form' (a nil value) stack traceback: coroutine 0: /usr/local/openresty/nginx/uploadtest.lua: in function </usr/local/openresty/nginx/uploadtest.lua:1>, client: 127.0.0.1, server: localhost, request: "POST /uploadtest HTTP/1.1", host: "127.0.0.1:8089"

Can you please help me what is wrong here?

ngx.exit(415) during read() loop does *not* cleanly exit - binary data spewed in log files

            local upname = nil
            while true do
                local typ, res, err = form:read()
-- bla bla do something
                
                if typ == "header" then
                    for k,v in pairs(res) do
                        local ext = string.match(v,'.+(%.7z.*)"') -- say we only want to permit files with this extension
                        if ext then
                            upname = ext
                        end
                    end
                end

               -- crude but we found our extension, if we didn't then 
                if not upname then
                    -- cleanup()
                    ngx.status = 415
                    ngx.exit(415) -- makes nginx dump binary fuzz into the error.log 
                end

-- sample bad output in error.log  after connnection RST issued

09:17:16 [info] 6461#6461: *511 client sent invalid method while readin                                                                 g client request line, client: 127.0.0.1, server: xxxxx, request: ▒▒"▒▒  ▒▒f

^^^ that kind of rubbish dumped in the error.log

HOWEVER - the Correct behaviour occurs if the file upload is small (<300-400k) - presumably all read into a single buffer.. by correct i mean the upload is terminated with a redirect to the configured error_page 415 /415.html and the content of the error page is duly served.

If the file is larger than that (500k+) ngx.exit(415) totally fails and spews bad output into error.log

What's going on here? Pipes not emptying properly? Request line disappearing? This is easily reproducible on the latest openresty+debian buster

security issues when use in WAF project

where will I find the file uploaded

Hi, I am really new to use nginx and lua. I am trying to upload a file from my local location to nginx server using lua-resty-upload . I have a docker build with base image openresty/openresty:1.15.8.3-buster
I tried the lua script provided in the readme section and i got the success output saying the file uploaded to location /tmp/[filename]
But on checking the docker location I couldnt find the file any where in the mentioned location. Am I missing anything here . Below is the the lua script

local upload = require "resty.upload"

local function my_get_file_name(header)
    local file_name
    for i, ele in ipairs(header) do
        file_name = string.match(ele, 'filename="(.*)"')
        if file_name and file_name ~= '' then
            return file_name
        end
    end
    return nil
end
local chunk_size = 4096
local form = upload:new(chunk_size)
local file
local file_path
while true do
    local typ, res, err = form:read()

    if not typ then
         ngx.say("failed to read: ", err)
         return
    end
    ngx.print("the variable value: ", typ)
    ngx.print("the res value: ", res)
    if typ == "header" then
        local file_name = my_get_file_name(res)
        if file_name then
            file_path = ngx.var.store_path..file_name
            file = io.open(file_path, "w")
            if not file then
                ngx.say("failed to open file ", file_path)
                return
            end
        end

    elseif typ == "body" then
        if file then
            file:write(res)
        end

    elseif typ == "part_end" then
        if file then
            file:close()
            file = nil
            ngx.say("upload to "..file_path.." successfully!")
        end
    elseif typ == "eof" then
        break

    else
        -- do nothing
    end
end

Is it necessary that have boundary in a post request？

@agentzh Does lua-resty upload module support curl's post request ?
There is one problem I got , I tried to use this command : curl -d 'payload' -X POST 'http://localhost/uploadfile?path=/data/test.txt to post data to server,but failed. The error log is posted below

2016/08/31 18:38:56 [error] 48977#0: 77 [lua] savefile.lua:5: the raw header is POST /uploadfile?path=/data/ds HTTP/1.1^M
User-Agent: curl/7.35.0^M
Host: localhost^M
Accept: */^M
Content-Length: 8^M
Content-Type: application/x-www-form-urlencoded^M
^M
, client: 127.0.0.1, server: localhost, request: "POST /uploadfile?path=/data/test.txt HTTP/1.1", host: "localhost"
2016/08/31 18:38:56 [error] 48977#0: *77 [lua] savefile.lua:11: failed to new upload: no boundary defined in Content-Type, client: 127.0.0.1, server: localhost, request: "POST /uploadfile?path=/data/test.txt HTTP/1.1", host: "localhost"

The Content-Type don't have boundary so the upload is failed. Is there any solution to solve this problem ?

oh,i want say something,openresty always have problem in upload image file

Are there anyone upload image file in trouble?
The picture which be upload to server ,it can't be open as image file , just like this:

The nomal pic:

And this is upload to server :

PS:I am chinese ,maybe i write many wrong world ,just ingroe it,just recognize my meaning

use upload but nginx is block

I use lua restry upload, and ngx.req.read_body() , I put those in /opt/xx.lua;

nginx conf as below ~
access_by_lua_file /opt/xx.lua
proxy_pass http://localhosy:9000

the proxy pass is my django project ,it works ,and I try to change another url~

I can process .lua in get and post(without file,use formdata is ok~) method,but when I post file ,the nginx alway raise error~

"
[error] 25390#0: *442 upstream prematurely closed connection while reading response header from upstream, client: 192.168.10.26, server: localhost, request: "POST /app/get_all_args/ HTTP/1.1", upstream: "http://127.0.0.1:8090/app/get_all_args/", host: "192.168.10.27"
"
IP 192.168.10.26 is my client
IP 192.168.10.27 is my nginx
URL 127.0.0.1:8090/app/get_all_args/ is my project,which is proxied to after lua accept~

client always block,and I try use ngx.say ~ It seems everything is ok~
So I don't know what's the problem is ~

In .lua when auth is ok , I use ngx.exit(ngx.OK) ngx.HTTP_OK is bad ~
when auth filed, I used ngx.say("xxx") then return
Now I am sure I use ngx.exit(ngx.OK)

So please help me~ Thank you ~

Sorry for my poor English~ I can desc it in Chinese~ = =!

remove unused code

line 8 in upload.lua
local get_headers = ngx.req.get_headers
is now unused.

Thanks

upload 2MB+ file failed

Hi, my version is openresty/1.9.15.1, When I upload 2MB+ size file I got "nginx: lua atpanic: Lua VM crashed, reason: unknown reason" Error,

I could upload 100KB file successfully. Seems some memory configure need changed?

Lose some data when use lua-resty-upload to write to a file.

When I upload a file via lua-resty-upload ,I find the latest uploaded file always lose some data,but when I upload another file, the previous file seems ok,it seems something has been buffered and not flush to the disk immediately。

    local upload = require "resty.upload"
    local chunk_size = 8192
    local form = upload:new(chunk_size)
    local uuid = require("resty.uuid")
    local file
    local currenttime = os.time()
    local filename = uuid().."-"..pid
    local file_name = uploadpath..filename
    if form then
    while true do
        local typ, res, err = form:read()
        if not typ then
              ngx.say(cjson.encode({code=1,message="nofile upload"}))
             return
        end

            if file_name then
                file = io.open(file_name, "a+")
                if not file then
                    ngx.say(cjson.encode({code=2,message="file save failed"}))
                    return
                end
            end


         if typ == "body" then
            if file then
                file:write(res)
            end

        elseif typ == "part_end" then
            file:close()
            file = nil
            file_name = nil
            ngx.say(cjson.encode({code=0,url=ngx.var.scheme.."://"..ngx.var.host.."/"..filename}))
            filename = nil
            return

        elseif typ == "eof" then
            break

        else
            -- do nothing
        end

    end
    else
        ngx.say(cjson.encode({code=1,message="nofile upload"}))
        return
    end

I call file:flush() before file:colse() ,there is no effect
My nginx version is 1.7.9 and use the latest lua-resty-upload lib

rest client上传的binary无法正确获取

我使用"curl -i -F '[email protected]' http://172.16.107.137/upload" ，后台能够正确的接收并处理binary。
但，使用rest client，比如java的httpclient或者postman等第三方工具上传的binary，后台无法正确获取。
求指导。

Remove file on Upload abort?

Hi,

i am uploading files and writing them to a filesystem using the code from the readme. However, when the upload is aborted, an incomplete file remains on the filesystem. Is there a way to automatically delete it, when the upload is aborted somewhere in the middle?

Best

Can this work with ngx.req.get_post_args()

I have some code like this

    ngx.ctx.uploads={} --m.getupload()
    ngx.req.read_body()
    ngx.ctx.posts={}
    args, err = ngx.req.get_post_args()
    for key, val in pairs(args) do
        ngx.ctx.posts[key]=val
        ngx.ctx.gets[key]=val

and m.getupload is using your library, to get all the uploads into table hashed by the input_name. it also save the non file data input to table posts

getupload:->
    form = upload\new(100000)
    file_name=""
    input_name=""
    resx=""
    result={}
    while form~=nil do
      typ, res, err = form\read()
      if typ == "header" then
        if res[1]=="Content-Disposition"
          tt=m.getfield(res)
          file_name = tt.filename
          input_name = tt.name
          resx=""

      elseif typ == "eof"
        break  
      elseif typ == "body"
        if input_name
          resx=resx..res

      elseif typ == "part_  "
        if file_name
          result[input_name]={file_name,resx}
          ngx.ctx.gets[input_name]=file_name
        else
          ngx.ctx.gets[input_name]=resx

        resx=""

if i enable uploads processing then the ngx.req.get_post_args() not work. perhaps i need to detect the enc-type multipart ?

Request header is repeated

``
read: ["header",["Content-Disposition","form-data; name="file1"; filename="a.txt"","Content-Disposition: form-data; name="file1"; filename="a.txt""]]
read: ["header",["Content-Type","text/plain","Content-Type: text/plain"]]
read: ["body","Hello"]
read: ["body",", wor"]
read: ["body","ld"]
read: ["part_end"]
read: ["header",["Content-Disposition","form-data; name="test"","Content-Disposition: form-data; name="test""]]
read: ["body","value"]
read: ["body","\r\n"]
read: ["part_end"]
read: ["eof"]
read: ["eof"]

Each request header content in pairs，

lua-nginx-module report http v2 not supported yet unexpectedly

I'm using the following version of Nginx.

nginx version: nginx/1.14.0
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/opt/nginx --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_auth_request_module --with-http_stub_status_module --with-threads --with-stream --with-stream_ssl_module --add-module=/tmp/ngx_devel_kit-0.3.0 --add-module=/tmp/lua-nginx-module-0.10.9rc7

I have defined four virtual servers in http config block. One virtual server is defined with listen 443 ssl;, while three other virtual servers are defined with listen 443 ssl http2;. The lua-nginx-module is used in the server without http2 configured to handle file upload. The code is as follows.

local req_socket = ngx.req.socket
local sock, err = req_socket()
if not sock then
    return nil, err
end

Strange thing is the error.log reports that http v2 is not supported yet. But the http2 is not even configured in this virtual server. The error log is as below.

2019/04/29 15:26:19 [error] 22281#22281: *6512 lua entry thread aborted: runtime error: /opt/nginx/co
nf/lua/resty/upload.lua:61: http v2 not supported yet
stack traceback:
coroutine 0:
        [C]: in function 'req_socket'
        /opt/nginx/conf/lua/resty/upload.lua:61: in function 'new'

It looks like the http2 configuration exists beyond the virtual server in which it's configured, like somehow it becomes a global thing.
After I delete the http2 in all three other virtual servers, the error.log stops reporting the error mentioned above.
I don't know what make this happen. Is it a bug or something wrong with my configuration?

value issue in additional header

I'm new to LUA, I tried to upload file with some meta data with curl command curl -i -X POST -F "uuid=123" -F "[email protected] http://somewhere"

But the value of uuid which is "123" seems be truncated in the the value, and even the line.

["Content-Disposition","form-data; name=\"uuid\"","Content-Disposition: form-data; name=\"uuid\""]

I noticed there're double \r\n pairs located between uuid and its value.

020: 39 36 63 64 63 33 39 31 35 33 0d 0a 43 6f 6e 74 96cdc39153..Cont
0030: 65 6e 74 2d 44 69 73 70 6f 73 69 74 69 6f 6e 3a ent-Disposition:
0040: 20 66 6f 72 6d 2d 64 61 74 61 3b 20 6e 61 6d 65  form-data; name
0050: 3d 22 75 75 69 64 22 0d 0a 0d 0a 31 32 33 0d 0a ="uuid"....123..
0060: 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d ----------------
0070: 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 30 62 --------------0b
0080: 39 36 63 64 63 33 39 31 35 33 0d 0a 43 6f 6e 74 96cdc39153..Cont
0090: 65 6e 74 2d 44 69 73 70 6f 73 69 74 69 6f 6e 3a ent-Disposition:
00a0: 20 66 6f 72 6d 2d 64 61 74 61 3b 20 6e 61 6d 65  form-data; name
00b0: 3d 22 66 69 6c 65 6f 62 6a 22 3b 20 66 69 6c 65 ="fileobj"; file
00c0: 6e 61 6d 65 3d 22 31 2e 74 78 74 22 0d 0a 43 6f name="1.txt"..Co
00d0: 6e 74 65 6e 74 2d 54 79 70 65 3a 20 74 65 78 74 ntent-Type: text
00e0: 2f 70 6c 61 69 6e 0d 0a 0d 0a                   /plain....

BTW. any better solution to obtain the extra information(you defined as header) from multipart uploading request?