nginx serving corrupt images
Dan Swaney
justdan23 at gmail.com
Fri Feb 24 03:42:55 UTC 2023
Saint, can you also run 'nginx -V' and drop your build configuration here
in this thread?
On Thu, Feb 23, 2023 at 10:41 PM Dan Swaney <justdan23 at gmail.com> wrote:
> 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
>>>>>>>>>>>>>
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