Nginx sendfile

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. This directive sets the maximum size of the temporary file. Learn more. Asked 5 years, 1 month ago. Active 5 years, 1 month ago. Viewed 2k times. Thx for any help nginx app.

Salamek Salamek 43 6 6 bronze badges. Can it be this: nginx. Selcuk And you are wining first price " Thank You " for first correct answer! Active Oldest Votes. The default value for this setting is MB. Selcuk Selcuk Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. The Overflow How many jobs can be done at home?

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If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. This is a wrapper around web-server specific methods for sending files to web clients. This is useful when Django needs to check permissions associated files, but does not want to serve the actual bytes of the file itself.

Note this should not be used for regular file serving e. You only need to implement the sending of the file. Adding the content-disposition headers etc is done elsewhere. The Development backend is only meant for use while writing code. It uses Django's static file serving code to do the job, which is only meant for development.

It reads the whole file into memory and the sends it down the wire - not good for big files, but ok when you are just testing things out. This backend is one step up from the development backend. It uses Django's django. File class to try and stream files from disk. However some middleware e.

GzipMiddleware that rewrites content will causes the entire file to be loaded into memory. So only use this backend if you are not using middleware that rewrites content or you only have very small files. It requires a bit more work to get it to do the same job as xsendfile though. This means that the files are visible via Apache by default too.

So we need to get Apache to hide those files from anything that's not an internal redirect. All files are stored in a folder called 'private'. You then need to configure nginx to only allow internal access to the files you wish to serve.

More details on this are here. From there it should be fairly easy to work out what the right settings are. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

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nginx sendfile

This might be the job of middleware have the middleware hijack the X-Sendfile header and modify it for nginxbut it would be nice to support this natively. I cannot support that from Flask because it requires a very specific setting in the server config that Flask cannot probe for.

This is something a middlware would have to translate. Isn't the interface the same? The only base difference is the header name "X-Sendfile" vs. You could just make sure the header name changes based on a config value.

nginx sendfile

In addition, I don't think flask needs to probe for this specifically for nginx, especially when it wouldn't do so for lighttpd or apache. X-Sendfile takes a filename to a file on a filesystem, X-Accel-Redirect takes a URI that might point to a resource set up in the nginx config to only accept internal requests. Are the semantics of the field important to Flask?

Wouldn't this detail only be important to the proxy? Under the current implementation, won't there be problems if flask is on a different system from apache or lighttpd and the file doesn't exist on the server? This check joins the filename with the app path:.

How to use X-Sendfile with PHP and Apache

How should that work? It does not accept actual filenames. I can just point to non-remote URIs there and the resources is not web available unless the nginx config is modified. So there is no chance that Flask could generically support it. The os. Flask should neither check nor assume that the file system used by apache or lighttpd are identical.

I am well aware of the fact that this is assuming the same machine. That however is not the problem I'm referring to. You can already emit X-Accel-Redirect headers yourself, you just cannot convert the filename even closely to a mapped URI for nginx. I wouldn't expect to make Flask responsible for generating the mapped uri for X-Accel-Redirect, so why would you expect it to resolve a filename for X-Sendfile?

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The feature works perfectly fine with filenames from other machines if you provide an absolute filename. Furthermore it also works flawless if you use an NFS share. Again: if you have suggestions how that could work, I would be happy to support it. I just don't see a way. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. New issue. Jump to bottom.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. When we have updated a file e. But when we change the settings from sendfile on; to sendfile off; the browser will load the correct version of the updated file.

For our production web server, should we use sendfile on; or sendfile off;? If sendfile on; is required May for the reason of better caching?

Faster performance? There may be a solution to your file caching problem at the application level. It's a well-known problem in the JavaScript development world. The solution is usually called something like "output hashing". The basic idea is to add a hash of the file contents to the file name so that the file is considered "new" and not found in the cache.

Key Files, Commands, and Directories with NGINX

Angular does it at build time see: --outputHashing. The only reasonable explanation is that your specific browser discards? Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Ask Question.

nginx sendfile

Asked 4 years, 4 months ago. Active 6 months ago. Viewed 10k times. We have this setting in our nginx.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I would like to know if there is any performance benefits to using x-sendfile, rather than express "static" middleware or "sendFile" express method.

I'm also curious about the reason x-sendfile is so few documented in the comunity of js servers, since it's kind of a common thing to do with a PHP server. Learn more. Asked 5 days ago. Active 5 days ago. Viewed 10 times. I currently have a node. Poyoman Poyoman 4 4 silver badges 13 13 bronze badges. Active Oldest Votes. Sign up or log in Sign up using Google.

Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. The Overflow How many jobs can be done at home? Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap. Triage needs to be fixed urgently, and users need to be notified upon…. Dark Mode Beta - help us root out low-contrast and un-converted bits. Technical site integration observational experiment live on Stack Overflow.Configuring Nginx is pretty easy, even if you are a newbie and have no previous experience.

nginx sendfile

In this post, we will give you an example of a simple but effective Nginx. It includes all of the common options and directives that most modern websites need. First, you have to locate your Nginx. It can be in different locations depending on the OS you are using or how you compiled Nginx. These are the most common ones:.

The other options is nobody. This is usually used for Nginx reverse proxy with Apache. You might need to increase this setting for busy servers. The most used for modern kernels 2. This is especially good for saving system resources and pushing more speed.

It must be enabled if sendfile is on. If a file is less than bytes, it will not be compressed. When the limit is reached, a Request Time-out error will be expected. It is required for a file descriptor to remain open in the cache. Topics Tips Contact Top 5. Toggle navigation Menu Topics Tips Contact. Think of us as your weekend read.

CTO Infranetworking. Share Tweet Share.This article a is translation by popular request of Optimisations Nginx, bien comprendre sendfile, tcpnodelay et tcpnopush I wrote in French in January. Unfortunately, almost none of them tell neither how they impact the Web server nor how they actually work. Everything started with a after Greg did the peer review of my Nginx configuration. He was challenging my optimization, asking me if I really knew what I was doing. How can you force a socket to send the data in its buffer?

To avoid network congestion, the TCP stack implements a mechanism that waits for the data up to 0. Imagine yourself back in the 90s, using telnet to connect on a distant machine over a RTC connection. Angle ensures you may have something else to type before the data is sent. It is even counterproductive when you need to stream data over the network.

Chances your file fills exactly a bunch of full packets are close to 0, which means Nagle creates a 0. When it comes to online gaming or high frequency trading, getting rid of latency is critical even at the price of a relative network saturation. Instead of optimizing delays, it optimizes the amount of data sent at once. Everything is well explained in the Linux kernel source code. Nginx initial fame came from its awesomeness at sending static files.

The sendfile Nginx option enables to use of sendfile 2 for everything related to… sending file. Unfortunately, sendfile 2 requires a file descriptor that supports mmap 2 and friends, which excludes UNIX sockets, for example as a way to send data to a local Rails backend without all the network latency.

Depending on your needs, sendfile can be either totally useless or completely essential. But if you use Nginx as a reverse proxy to serve pages from an application server, you can deactivate it.

Unless you start serving micro caching on a tmpfs. I was wondering why anyone would mix 2 antithetic and mutually exclusive options. The answer lies deep inside a thread from the Russian Nginx mailing list. This greatly reduces network overhead and speeds the way files are sent.

When set indicates to always queue non-full frames. Later the user clears this option and we transmit any pending partial frames in the queue. This is meant to be used alongside sendfile to get properly filled frames when the user for example must write out headers with a write call first and then use sendfile to send out the data parts.

Many thanks to ArthurBrunoBsdsx and Ludovic for proofreading this article, and to Greg for both his deep knowledge and for kicking my ass until I came back to him with answers to his questions. Sign in. Some rights reserved. Network Nginx. Fred Thoughts Follow. Startup advisor. Sarcasm fluent. See responses 3. More From Medium. Related reads. Luc Juggery in Better Programming. Discover Medium. Make Medium yours. Become a member. About Help Legal.


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