nginx serving corrupt images

Dan Swaney justdan23 at gmail.com
Fri Feb 24 03:41:31 UTC 2023


To use HTTP2, you have to configure the build to include it.  Same goes for
Kerberos GSSAPI SPNEGO Authentication support with the SPNEGO Module for
NGINX.


> nginx version: nginx/1.23.3
> built by cl 19.34.31937 for x64
> *built with OpenSSL 3.1.0-beta1-dev*
> TLS SNI support enabled
> configure arguments: --with-cc=cl --builddir=objs --with-debug --prefix=.
> --conf-path=conf/nginx.conf --pid-path=logs/nginx.pid
> --http-log-path=logs/access.log --error-log-path=logs/error.log
> --sbin-path=nginx.exe --http-client-body-temp-path=temp/client_body_temp
> --http-proxy-temp-path=temp/proxy_temp
> --http-fastcgi-temp-path=temp/fastcgi_temp
> --http-scgi-temp-path=temp/scgi_temp --http-uwsgi-temp-path=temp/uwsgi_temp
> --with-cc-opt=-DFD_SETSIZE=1024 --with-pcre=objs/lib/pcre2
> --with-zlib=objs/lib/zlib --with-select_module *--with-http_v2_module*
> --with-http_realip_module --with-http_addition_module
> --with-http_sub_module --with-http_dav_module
> --with-http_stub_status_module --with-http_flv_module
> --with-http_mp4_module --with-http_gunzip_module
> --with-http_gzip_static_module --with-http_auth_request_module
> --with-http_random_index_module --with-http_secure_link_module
> --with-http_slice_module --with-mail --with-stream --with-http_ssl_module
> --with-mail_ssl_module --with-stream_ssl_module
> --with-openssl=objs/lib/openssl
> --add-module=objs/lib/spnego-http-auth-nginx-module --with-cc-opt='-I
> objs/lib/krb5/objs/include'
>


On Thu, Feb 23, 2023 at 10:30 PM Saint Michael <venefax at gmail.com> wrote:

> I enabled http2 but it fails
>
> nginx: [emerg] the "http2" parameter requires ngx_http_v2_module in
> /etc/federico/x3x.conf:17
>
> On Thu, Feb 23, 2023 at 10:25 PM Saint Michael <venefax at gmail.com> wrote:
>
>> can we add that at the top level? like a global value?
>>
>>
>> On Thu, Feb 23, 2023 at 10:17 PM Dan Swaney <justdan23 at gmail.com> wrote:
>>
>>> See my earlier response above for details.  It works when you reduce the
>>> ssl_buffer_size to 4k.  You can try 8k for performance.
>>> (Correction: use the 'server' section for this setting.)
>>>
>>> server {
>>>    ...
>>>    ssl_buffer_size 4k;
>>> }
>>>
>>> Reference to setting is on this page:
>>>
>>> https://haydenjames.io/nginx-tuning-tips-tls-ssl-https-ttfb-latency/
>>>
>>>
>>> The bug happens to be within the OpenSSL library I believe, but I found
>>> when reducing the buffer size to 4k, it worked for my test.
>>> There is a bug when it operates with the default of 16k and it fails to
>>> write out the response in 16k chunks, but does work with 4k chunks.
>>>
>>> On Thu, Feb 23, 2023 at 10:06 PM Saint Michael <venefax at gmail.com>
>>> wrote:
>>>
>>>> Please read this, it's from 2011/11/04, and it hasn't been fixed :
>>>>
>>>> https://tech.blog.aknin.name/2011/11/04/nginxgzip-module-might-silently-corrupt-data-upon-backend-failure/
>>>>
>>>>
>>>> On Thu, Feb 23, 2023 at 9:43 PM Dan Swaney <justdan23 at gmail.com> wrote:
>>>>
>>>>> Ah-ah...I caught the NGINX failure in the SSL response:
>>>>>
>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http filename:
>>>>>> "./html/images/image001.jpg"
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 add cleanup:
>>>>>> 000002DC83A7CBE8
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http static fd: 732
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http set discard body
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http map started
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 parse header: "Cookie:
>>>>>> SessionId SessionId="
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http map started
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http map: "" ""
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http script var: ""
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http map: "" ""
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http script copy:
>>>>>> "SessionId SessionId="
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http script var: ""
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http script copy: ";AuthId="
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http script var: "SessionId
>>>>>> SessionId="
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http script copy: "
>>>>>> SessionId="
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http script var:
>>>>>> "ab3e389a16b819b5477309665cfcc4672f47d5657e1c154381c6eb8336963721"
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http script copy: "; Domain=
>>>>>> win10-web-svr.dreamstone.com; Path=/; HttpOnly; Secure"
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 HTTP/1.1 200 OK
>>>>>> Server: nginx/1.23.3
>>>>>> Date: Fri, 24 Feb 2023 02:24:49 GMT
>>>>>> Content-Type: application/octetstream
>>>>>> *Content-Length: 123197*
>>>>>> Last-Modified: Wed, 30 Nov 2022 19:41:21 GMT
>>>>>> Connection: keep-alive
>>>>>> ETag: "6387b1e1-1e13d"
>>>>>> Strict-Transport-Security: max-age=15768000; preload
>>>>>> X-Frame-Options: SAMEORIGIN
>>>>>> X-XSS-Protection: 1
>>>>>> X-Content-Type-Options: nosniff
>>>>>> Referred-Policy: strict-origin
>>>>>> Set-Cookie: SessionId SessionId=;AuthId=SessionId SessionId=
>>>>>> SessionId=ab3e389a16b819b5477309665cfcc4672f47d5657e1c154381c6eb8336963721;
>>>>>> Domain=win10-web-svr.dreamstone.com; Path=/; HttpOnly; Secure
>>>>>> Accept-Ranges: bytes
>>>>>>
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 write new buf t:1 f:0
>>>>>> 000002DC83A7E2F0, pos 000002DC83A7E2F0, size: 626 file: 0, size: 0
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http write filter: l:0 f:0
>>>>>> s:626
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http output filter
>>>>>> "/images/image001.jpg?"
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http copy filter:
>>>>>> "/images/image001.jpg?"
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 malloc:
>>>>>> 000002DC83A87340:32768
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http postpone filter
>>>>>> "/images/image001.jpg?" 000002DC83A7E658
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 write old buf t:1 f:0
>>>>>> 000002DC83A7E2F0, pos 000002DC83A7E2F0, size: 626 file: 0, size: 0
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 write new buf t:1 f:0
>>>>>> 000002DC83A87340, pos 000002DC83A87340, size: 32768 file: 0, size: 0
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http write filter: l:0 f:1
>>>>>> s:33394
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http write filter limit
>>>>>> 2097152
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 malloc:
>>>>>> 000002DC83A8F350:16384
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 SSL buf copy: 626
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 SSL buf copy: 15758
>>>>>> *2023/02/23 21:24:49 [debug] 4768#4528: *1 SSL to write: 16384*
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: ssl remove session: B87DD7B9:32
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: shmtx lock
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: shmtx unlock
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 SSL_write: -1
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 SSL_get_error: 1
>>>>>>
>>>>>> *2023/02/23 21:24:49 [crit] 4768#4528: *1 SSL_write() failed (SSL:
>>>>>> error:0A0C0103:SSL routines::internal error) while sending response to
>>>>>> client, client: 192.168.80.130, server: win10-web-svr.dreamstone.com
>>>>>> <http://win10-web-svr.dreamstone.com>, request: "GET /images/image001.jpg
>>>>>> HTTP/1.1", host: "win10-web-svr.dreamstone.com
>>>>>> <http://win10-web-svr.dreamstone.com>", referrer:
>>>>>> "https://win10-web-svr.dreamstone.com/
>>>>>> <https://win10-web-svr.dreamstone.com/>"*2023/02/23 21:24:49 [debug]
>>>>>> 4768#4528: *1 http write filter FFFFFFFFFFFFFFFF
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http copy filter: -1
>>>>>> "/images/image001.jpg?"
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http finalize request: -1,
>>>>>> "/images/image001.jpg?" a:1, c:1
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http terminate request
>>>>>> count:1
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http terminate cleanup
>>>>>> count:1 blk:0
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http posted request:
>>>>>> "/images/image001.jpg?"
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http terminate handler
>>>>>> count:1
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http request count:1 blk:0
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http close request
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 http log handler
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 run cleanup:
>>>>>> 000002DC83A7CBE8
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 file cleanup: fd:732
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 free: 000002DC83A87340
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 free: 000002DC83A7BC00,
>>>>>> unused: 0
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 free: 000002DC83A7DC20,
>>>>>> unused: 1167
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 close http connection: 500
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 select del event fd:500
>>>>>> ev:768
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 reusable connection: 0
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 free: 000002DC83A647C0
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 free: 000002DC83A8F350
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 free: 000002DC8332EAB0,
>>>>>> unused: 12
>>>>>> 2023/02/23 21:24:49 [debug] 4768#4528: *1 free: 000002DC83A7DA10,
>>>>>> unused: 384
>>>>>>
>>>>>
>>>>> On Thu, Feb 23, 2023 at 9:32 PM Dan Swaney <justdan23 at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> I tried to reproduce it with a simple web page and I'm seeing the
>>>>>> issue which I believe you are having.
>>>>>>
>>>>>> By default, NGINX seems to default to some limit of 15k on responses
>>>>>> of images returned directly.
>>>>>>
>>>>>> While the error.log in debug mode shows it constructs the response
>>>>>> with the right content length, it fails to return a response if the file is
>>>>>> over 15k.
>>>>>>
>>>>>> I'm using a build I did from NGINX 1.23.3.  While I know I have
>>>>>> returned files larger than this in proxy mode.  This seems to be happening
>>>>>> in normal web server page mode.
>>>>>>
>>>>>> [image: image.png]
>>>>>>
>>>>>>
>>>>>> I even tried to increase it by adding:
>>>>>>
>>>>>>         location / {
>>>>>>>             root   html;
>>>>>>>             index  index.html index.htm favicon.ico;
>>>>>>>
>>>>>>>             types {
>>>>>>>                text/html  html;
>>>>>>>                image/gif  gif;
>>>>>>>                application/octetstream jpg;
>>>>>>>                application/octetstream png;
>>>>>>>             }
>>>>>>>
>>>>>>>             set $max_image_size 50000;
>>>>>>>             client_max_body_size 50000;
>>>>>>>         }
>>>>>>>
>>>>>>
>>>>>> On Thu, Feb 23, 2023 at 8:09 PM Dan Swaney <justdan23 at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Try this:
>>>>>>>
>>>>>>>    1. At the very top of your nginx.conf file, add a definition:
>>>>>>>
>>>>>>>            error_log  logs/error.log debug;
>>>>>>>
>>>>>>>    2. Within your nginx install directory (where nginx.exe exists),
>>>>>>>    create a 'logs' folder if one does not exist.
>>>>>>>    3. Restart nginx.exe (if running as a Windows Service with NSSM,
>>>>>>>    then restart the service).
>>>>>>>    4. If NGINX does not start...
>>>>>>>       - Check the 'error.log' as it will tell you if your
>>>>>>>       nginx.conf has something weird in it that it doesn't like.
>>>>>>>    5. If NGINX started successfully...
>>>>>>>       - Run your test from your client browser.
>>>>>>>       - Go back to the Server and check your 'error.log' and look
>>>>>>>       for the URL request.
>>>>>>>       - It will show you everything it does with routing or looking
>>>>>>>       for files.
>>>>>>>
>>>>>>>
>>>>>>> On Thu, Feb 23, 2023 at 7:22 PM Saint Michael <venefax at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Now it remains broken and I have no idea how to fix it. I guess is
>>>>>>>> caching bad copies of the pictures.
>>>>>>>> I re-uploaded the two images.
>>>>>>>> Kindly let me know if this is "normal"
>>>>>>>> [image: image.png]
>>>>>>>>
>>>>>>>> On Thu, Feb 23, 2023 at 7:08 PM Dan Swaney <justdan23 at gmail.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Now your image001.jpg is returning your home page:
>>>>>>>>> [image: image.png]
>>>>>>>>>
>>>>>>>>> If I had to guess, your location routing is re-routing all
>>>>>>>>> sub-urls to your base URL at '/' which is defaulting to your index.html (or
>>>>>>>>> whatever you have set for your default).
>>>>>>>>> The tip was when it returns the content type as 'text/html'
>>>>>>>>> instead of 'image/jpg'.
>>>>>>>>>
>>>>>>>>> As Maxim cited, your 'location' directives are for routing URL
>>>>>>>>> paths and not files.  Think of the external viewed URL and the internal
>>>>>>>>> routed URL location.
>>>>>>>>>
>>>>>>>>> Looking at your previous cited partial nginx.conf:
>>>>>>>>>
>>>>>>>>>    - root /static/duc/;
>>>>>>>>>       - I usually define this in my 'location' base section only
>>>>>>>>>       and drop the initial '/' if it is relative to where NGINX is running.
>>>>>>>>>          - I then don't need it in any other 'location' sections
>>>>>>>>>          for sub-folders which have different security.
>>>>>>>>>       - You have it defined in your 'server' section.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>    - default_type  'text/html; charset=UTF-8';
>>>>>>>>>       - I usually define this at the top of my 'http' section.
>>>>>>>>>          - Normally I use 'default_type
>>>>>>>>>           application/octet-stream;'
>>>>>>>>>       - You have it defined in your 'server' section.
>>>>>>>>>       - I see it returning your images as 'text/html'.
>>>>>>>>>
>>>>>>>>>       - try_files $uri $uri/ /index.html;
>>>>>>>>>    - I usually define a default 'index' if at the root and
>>>>>>>>>       nothing else is added.
>>>>>>>>>          - For example: 'index index.html;'
>>>>>>>>>       - Remove the try_files like recommended earlier.
>>>>>>>>>       - If you need to restrict access to specific folder URL
>>>>>>>>>       mappings, then define a location of the URL mapping and add one line...
>>>>>>>>>          - 'deny all;'
>>>>>>>>>          - Otherwise leave it open to all sub URLs by doing
>>>>>>>>>          nothing more but use a single 'location /' rule.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Thu, Feb 23, 2023 at 6:15 PM Dan Swaney <justdan23 at gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> I just ran your test and it works fine from Chrome and in Visual
>>>>>>>>>> Studio Code:
>>>>>>>>>>
>>>>>>>>>> > wget https://x3x.us/index_files/image001.jpg
>>>>>>>>>>> StatusCode        : 200
>>>>>>>>>>> StatusCode        : 200
>>>>>>>>>>> StatusDescription : OK
>>>>>>>>>>> Content           : {255, 216, 255, 224...}
>>>>>>>>>>> RawContent        : HTTP/1.1 200 OK
>>>>>>>>>>>                     Connection: keep-alive
>>>>>>>>>>>                     Strict-Transport-Security: max-age=31536000;
>>>>>>>>>>> includeSubDomains
>>>>>>>>>>>                     Accept-Ranges: bytes
>>>>>>>>>>>                     Content-Length: 8834
>>>>>>>>>>>                     Content-Type: image/jpeg
>>>>>>>>>>>                     Date: Thu, 23 Feb 2023 23...
>>>>>>>>>>> Headers           : {[Connection, keep-alive],
>>>>>>>>>>> [Strict-Transport-Security, max-age=31536000; includeSubDomains],
>>>>>>>>>>> [Accept-Ranges, bytes],
>>>>>>>>>>>                     [Content-Length, 8834]...}
>>>>>>>>>>> RawContentLength  : 8834
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> [image: image.png]
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Wed, Feb 22, 2023 at 7:36 PM Saint Michael <venefax at gmail.com>
>>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>>> a) The error does not have a single line.
>>>>>>>>>>> b) restarting does not fix it
>>>>>>>>>>> c) my nginx is no acting as proxy
>>>>>>>>>>> d) it happened twice and both times I fixed it by turning gzip
>>>>>>>>>>> off, restarting, and back on.
>>>>>>>>>>> e) I also noticed that I requested the image file with wget, get
>>>>>>>>>>> a full HTML file for the whole document, but named as if it were the image
>>>>>>>>>>> file.
>>>>>>>>>>>
>>>>>>>>>>> wget https://x3x.us/index_files/image001.jpg
>>>>>>>>>>> but `stat image001.jpg' showed it was the entire text HTML file.
>>>>>>>>>>>
>>>>>>>>>>> http {
>>>>>>>>>>> client_max_body_size 1500M;
>>>>>>>>>>>     include       mime.types;
>>>>>>>>>>>    # default_type  application/octet-stream;
>>>>>>>>>>>
>>>>>>>>>>>     #log_format  main  '$remote_addr - $remote_user
>>>>>>>>>>> [$time_local] "$request" '
>>>>>>>>>>>     #                  '$status $body_bytes_sent "$http_referer"
>>>>>>>>>>> '
>>>>>>>>>>>     #                  '"$http_user_agent"
>>>>>>>>>>> "$http_x_forwarded_for"';
>>>>>>>>>>>
>>>>>>>>>>>     #access_log  logs/access.log  main;
>>>>>>>>>>>     sendfile        on;
>>>>>>>>>>>     tcp_nopush     on;
>>>>>>>>>>>     tcp_nodelay     on;
>>>>>>>>>>> gzip on;
>>>>>>>>>>> gzip_vary on;
>>>>>>>>>>> gzip_min_length 10240;
>>>>>>>>>>> gzip_proxied expired no-cache no-store private auth;
>>>>>>>>>>> gzip_types text/plain text/css text/xml text/javascript
>>>>>>>>>>> application/x-javascript application/xml;
>>>>>>>>>>> gzip_disable "MSIE [1-6]\.";
>>>>>>>>>>>     #keepalive_timeout  0;
>>>>>>>>>>>     keepalive_timeout  65;
>>>>>>>>>>>  types_hash_max_size 2048;
>>>>>>>>>>> proxy_headers_hash_max_size 1024;
>>>>>>>>>>> proxy_headers_hash_bucket_size 128;
>>>>>>>>>>>         #gzip  on;
>>>>>>>>>>>     #    error_log  /var/log/nginx/error.log debug;
>>>>>>>>>>>
>>>>>>>>>>> error_log /var/log/nginx/error.log error;
>>>>>>>>>>> error_log /var/log/nginx/error.log crit;
>>>>>>>>>>>
>>>>>>>>>>>         access_log  /var/log/nginx/access.log;
>>>>>>>>>>>
>>>>>>>>>>> server {
>>>>>>>>>>>         add_header Strict-Transport-Security "max-age=31536000;
>>>>>>>>>>> includeSubDomains" always;
>>>>>>>>>>>         default_type  'text/html; charset=UTF-8';
>>>>>>>>>>>     listen 208.78.161.6:80;
>>>>>>>>>>>     server_name x3x.us;
>>>>>>>>>>>
>>>>>>>>>>>     # Redirect all domains to https://x3x.us
>>>>>>>>>>>     if ($scheme != "https") {
>>>>>>>>>>>         return 301 https://x3x.us$request_uri;
>>>>>>>>>>>     }
>>>>>>>>>>> }
>>>>>>>>>>>
>>>>>>>>>>> server {
>>>>>>>>>>>        add_header Strict-Transport-Security "max-age=31536000;
>>>>>>>>>>> includeSubDomains" always;
>>>>>>>>>>>         default_type  'text/html; charset=UTF-8';
>>>>>>>>>>>     listen 208.78.161.6:443 ssl;
>>>>>>>>>>>     server_name x3x.us;
>>>>>>>>>>>
>>>>>>>>>>>     ssl_certificate /etc/letsencrypt/live/x3x.us/fullchain.pem;
>>>>>>>>>>>     ssl_certificate_key /etc/letsencrypt/live/x3x.us/privkey.pem
>>>>>>>>>>> ;
>>>>>>>>>>>
>>>>>>>>>>> root /static/duc/;
>>>>>>>>>>>
>>>>>>>>>>>         location / {
>>>>>>>>>>>
>>>>>>>>>>> try_files $uri $uri/ /index.html;
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> }
>>>>>>>>>>>
>>>>>>>>>>> } #server
>>>>>>>>>>>
>>>>>>>>>>> } #http
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Wed, Feb 22, 2023 at 7:17 PM Maxim Dounin <mdounin at mdounin.ru>
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Hello!
>>>>>>>>>>>>
>>>>>>>>>>>> On Wed, Feb 22, 2023 at 02:46:29PM -0500, Saint Michael wrote:
>>>>>>>>>>>>
>>>>>>>>>>>> > It's not a misconfiguration, is a huge bug.
>>>>>>>>>>>> > A wasted two days of sleep for something that is 100% a bug.
>>>>>>>>>>>> > Please read here:
>>>>>>>>>>>> >
>>>>>>>>>>>> https://laracasts.com/discuss/channels/general-discussion/homestead-nginx-serving-wrong-images-and-only-cut-in-the-middle
>>>>>>>>>>>> > He mentions the same exact problem and also he points to
>>>>>>>>>>>> >
>>>>>>>>>>>> https://tech.blog.aknin.name/2011/11/04/nginxgzip-module-might-silently-corrupt-data-upon-backend-failure/
>>>>>>>>>>>> > where the author says that Niginx will not fix it.
>>>>>>>>>>>> > So he already tried he was rebuffed.
>>>>>>>>>>>>
>>>>>>>>>>>> The fun fact is that the referenced article doesn't state "will
>>>>>>>>>>>> not fix", but rather "not a top priority".  Further, proper
>>>>>>>>>>>> error
>>>>>>>>>>>> propagation is available in nginx for about 10 years now, since
>>>>>>>>>>>> 2013 (http://hg.nginx.org/nginx/rev/d3eab5e2df5f, nginx
>>>>>>>>>>>> 1.5.3).
>>>>>>>>>>>> Quoting CHANGES:
>>>>>>>>>>>>
>>>>>>>>>>>>     *) Change: now after receiving an incomplete response from
>>>>>>>>>>>> a backend
>>>>>>>>>>>>        server nginx tries to send an available part of the
>>>>>>>>>>>> response to a
>>>>>>>>>>>>        client, and then closes client connection.
>>>>>>>>>>>>
>>>>>>>>>>>> As long as nginx have an information about an error, it will
>>>>>>>>>>>> preserve this information and propagate it to the client.
>>>>>>>>>>>>
>>>>>>>>>>>> Also note that it is only expected to make a difference if you
>>>>>>>>>>>> are
>>>>>>>>>>>> using nginx as a proxy, not to directly serve files.  And only
>>>>>>>>>>>> in
>>>>>>>>>>>> case of errors.  That is, if you are seeing the behaviour
>>>>>>>>>>>> described, it might be a good idea to focus on the errors in
>>>>>>>>>>>> the
>>>>>>>>>>>> first place.
>>>>>>>>>>>>
>>>>>>>>>>>> I don't think it's anyhow related though, as switching gzip off
>>>>>>>>>>>> and back on, as seems to be "the fix" described in the first
>>>>>>>>>>>> link,
>>>>>>>>>>>> is not going to help with anything.  The important part is
>>>>>>>>>>>> likely
>>>>>>>>>>>> "restarted the server", so I would rather assume that "the
>>>>>>>>>>>> server"
>>>>>>>>>>>> (not sure if it refers to nginx or the whole server) was using
>>>>>>>>>>>> an
>>>>>>>>>>>> incorrect configuration and/or was out of some resources, and
>>>>>>>>>>>> restart fixed it.
>>>>>>>>>>>>
>>>>>>>>>>>> Summing the above, if you want to find out what goes wrong in
>>>>>>>>>>>> your
>>>>>>>>>>>> case - you may want to provide more details.  If you don't,
>>>>>>>>>>>> nobody
>>>>>>>>>>>> will be able to do it, unfortunately.
>>>>>>>>>>>>
>>>>>>>>>>>> The most basic thing I would recommend in the first place is to
>>>>>>>>>>>> look into nginx error log, it is likely to contain important
>>>>>>>>>>>> information if something goes wrong.
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> Maxim Dounin
>>>>>>>>>>>> http://mdounin.ru/
>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>> nginx mailing list
>>>>>>>>>>>> nginx at nginx.org
>>>>>>>>>>>> https://mailman.nginx.org/mailman/listinfo/nginx
>>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________
>>>>>>>>>>> nginx mailing list
>>>>>>>>>>> nginx at nginx.org
>>>>>>>>>>> https://mailman.nginx.org/mailman/listinfo/nginx
>>>>>>>>>>>
>>>>>>>>>> _______________________________________________
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