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nsfw-detector-api's Issues

[BUG] Cannot check image type properly in some image hosting service

Issue

Edge case, some image hosting service doesn't support HEAD method to probe whether image file is exists.
Example:

curl -X HEAD https://void.cat/d/3Kyd4r7uL8fYCNtWF354f1.webp -vv

will give error 404

* using HTTP/2
* h2h3 [:method: HEAD]
* h2h3 [:path: /d/3Kyd4r7uL8fYCNtWF354f1.webp]
* h2h3 [:scheme: https]
* h2h3 [:authority: void.cat]
* h2h3 [user-agent: curl/7.88.1]
* h2h3 [accept: */*]
* Using Stream ID: 1 (easy handle 0x564f82b5dc70)
> HEAD /d/3Kyd4r7uL8fYCNtWF354f1.webp HTTP/2
> Host: void.cat
> user-agent: curl/7.88.1
> accept: */*
> 
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* old SSL session ID is stale, removing
< HTTP/2 404

while using GET will provide valid response:

> GET /d/3Kyd4r7uL8fYCNtWF354f1.webp HTTP/2
> Host: void.cat
> user-agent: curl/7.88.1
> accept: */*
> 
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* old SSL session ID is stale, removing
< HTTP/2 200 
< date: Mon, 18 Sep 2023 00:52:26 GMT
< content-type: image/webp
< accept-ranges: bytes
< cache-control: public,max-age=86400
< x-frame-options: SAMEORIGIN
< content-disposition: inline; filename="The-development-of-coffee-fruits.png"
< strict-transport-security: max-age=15724800; includeSubDomains

Solution

Add an optional environment variable such as ENABLE_CONTENT_TYPE_CHECK=false to control behavior of app whether to probe using HEAD to get content info or not.

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