fasthttp | Tuned for high performance | Performance Testing library

 by   valyala Go Version: v1.47.0 License: MIT

kandi X-RAY | fasthttp Summary

kandi X-RAY | fasthttp Summary

fasthttp is a Go library typically used in Testing, Performance Testing applications. fasthttp has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Fast HTTP implementation for Go.

            kandi-support Support

              fasthttp has a medium active ecosystem.
              It has 19701 star(s) with 1643 fork(s). There are 399 watchers for this library.
              There were 3 major release(s) in the last 12 months.
              There are 62 open issues and 884 have been closed. On average issues are closed in 3 days. There are 8 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of fasthttp is v1.47.0

            kandi-Quality Quality

              fasthttp has 0 bugs and 0 code smells.

            kandi-Security Security

              fasthttp has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              fasthttp code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              fasthttp is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              fasthttp releases are available to install and integrate.
              Installation instructions are not available. Examples and code snippets are available.
              It has 30029 lines of code, 1865 functions and 111 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of fasthttp
            Get all kandi verified functions for this library.

            fasthttp Key Features

            No Key Features are available at this moment for fasthttp.

            fasthttp Examples and Code Snippets

            No Code Snippets are available at this moment for fasthttp.

            Community Discussions


            Global Variable Gives SIGSEGV
            Asked 2021-Dec-19 at 00:24

            I am using Fiber to develop a backend. I have a map that is a global variable that holds the socket connections. When I use the global variable from the same package, no problem here, everything works fine. But, when I try to use the sockets from a route function, I am getting the error below.

            I tried to use mutex.lock but no luck.

            I checked the code, the socket is not nil in my sendToAll method but it becomes nil in the helper method( inside the lib:*Conn).WriteMessage )

            Any advice is welcome.




            Answered 2021-Dec-19 at 00:24

            This panic is confusing because there are actually two packages called websocket. One in and another one in, and both have their own *websocket.Conn. However the websocket.Conn in actually embeds the websocket.Conn from (I know, terrible design) making what's going on unclear.

            Your call to c.WriteMessage is actually going to c.Conn.WriteMessage, and c.Conn is what's nil. So in your nil check, you actually need to do if c == nil || c.Conn == nil { to check the embedded struct as well.



            error "data1.Body undefined (type []byte has no field or method Body)" when trying to decode a json's body
            Asked 2021-Dec-03 at 21:08

            So again im trying to get this data but it is returning an error of



            Answered 2021-Dec-03 at 21:08



            golang replace fasthttp to gin with slice bounds out of range runtime error
            Asked 2021-Sep-16 at 15:17

            looking into a httpserver and see if it is possible to change from fasthttp to gin but stuck and having a runtime error during routing from middleware. I am trying to keep the code similar to each other if possible.




            Answered 2021-Sep-16 at 15:17

            Use a single engine with groups:



            panic: runtime error: invalid memory address or nil pointer dereference (time and again)
            Asked 2021-Jun-03 at 16:12

            I am very new to golang and for the most part have no idea what im doing so far. I tried to run a simple find() query to get all documents from my databse and I cant seem to get it to work i keep getting this error



            Answered 2021-Jun-03 at 13:18

            DB is nil, because var DB=database.DB runs before database.DB is initialized.

            Use database.DB directly.



            How do you profile a Go fasthttp/router application?
            Asked 2021-Apr-29 at 17:01

            I'd like to profile my Go HTTP server application to see if there are places where it can be optimized. I'm using the fasthttp package with the fasthttp/router package, and I'm struggling to figure out how to hook up pprof.

            The basic setup looks like this, obviously very abridged:



            Answered 2021-Apr-29 at 17:01

            You can use net/http/pprof for profiling.
            fasthttp provides custom implementation for the same. You can use that same as the net/http/pprof.

            To use this, register the handler as:



            locust ignoring extended sub classes and instantiates base classes
            Asked 2020-Dec-08 at 21:45

            i want to write base http user class and base load test shape and then extend them in sub classes but locust doesn't under stands extended classes and instatiate bas classes these are base classes



            Answered 2020-Dec-08 at 21:45

            Base User classes need an attribute abstract = True to not be instantiated.

            I dont think you can do the same with load shape classes, but you can use class attributes (which you can manipulate in your locustfile after importing it)

            Like removing Rps class and instead just doing



            How do I make go fasthttp server to trigger the handler faster at a fileupload?
            Asked 2020-Jun-05 at 12:25

            I use fasthttp for a file server project. The file server has an upload function. For uploading files I pass a key as a URL Query to validate the permission for upload.

            The main():



            Answered 2020-Jun-05 at 12:09

            For big file uploads browsers send a Expect: 100-continue header to ask the server if it's ok for them to continue with the upload. You could use to check for permissions and either allow or reject the upload.

            Fasthttp will always read the full response before calling a handler. This allows for a more performant API with less allocations.



            Correct use of fasthttp.Client combined with goroutines
            Asked 2020-Jun-02 at 09:37

            I am new to Go and am looking for the correct way of using net/http or fasthttp with goroutines. Unfortunately there are not many fasthttp client examples out there.

            I found the following code: (Example1)



            Answered 2020-Jun-02 at 09:37

            The big answer: both are correct (as in they work just fine), just different.

            Per the docs, a fasthttp.Client is safe for concurrent use so sharing one instance is fine. It may run into concurrent connection limits but that might not be an issue.

            The second example does have some overhead and will not be able to reuse connections or parameters, but again this could be a use case where it does not matter (if I only perform two operations, saving on the overhead might not be worth optimizing for).

            For the second part of the question:

            • c is already a *fasthttp.Client, so there's not need to take its address (&fasthttp.Client returns a pointer to a new fasthttp.Client)
            • wg is a plain sync.WaitGroup so the address must be taken



            Websocket on Docker with nginx
            Asked 2020-Feb-17 at 16:43

            I am trying to build a service with two parts: a backend and a frontend. Both are on a different docker container and are communicating through the docker-compose configuration and a nginx container.

            For https access, everything's good, but when I am trying to work with websocket, I have an upgrade error, even if the Nginx configuration got this information

            Error message : websocket: the client is not using the websocket protocol: 'upgrade' token not found in 'Connection' header

            I am using a fasthttp and fasthttp/websocket for my Golang backend. The code is working on localhost (no nginx configuration), but the combinaison of Docker + nginx seems to break something. The front-end works with react and is a simple let socket = new WebSocket(;

            EDIT :

            • when using ctx.Request.Header.ConnectionUpgrade() just before upgrader.Upgrade, the result is true, but ctx.Response.Header.ConnectionUpgrade() is false

            Thank you !

            Golang Backend



            Answered 2020-Feb-13 at 03:02

            I believe upgrade should be a string:



            How to create HTTP Session in Go
            Asked 2020-Feb-06 at 10:49

            I am currently using fasthttp for sending my requests my question is, is there a way to have a persistent session? I need the cookies and data to stick.

            c := fasthttp.Client{ Name: "Add To Cart",}



            Answered 2020-Feb-06 at 10:49

            Based on your question I think this is already clear to you, but just in case: Sessions aren't started on the client, they are started on the server. The server checks to see if a specific cookie exists; if it does it resumes the session that the cookie identifies; if it doesn't it creates a new session and sends the identifier back to the client as a cookie. All the client needs to do is send the correct cookie to the server.

            So, you need to read and write cookies. The fasthttp.Client.Post() interface doesn't allow you to do that. So instead of that nice interface, things become rather ugly.

            You need to ask fasthttp for both a Request and Response object before you do the request. Once you've done the initial request, you need to either look all cookies, or read out a specific cookie. You can now use those values for your next request.

            I've written a short example of how you would do this.


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install fasthttp

            You can download it from GitHub.


            Currently fasthttp is successfully used by VertaMedia in a production serving up to 200K rps from more than 1.5M concurrent keep-alive connections per physical server.
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
          • HTTPS


          • CLI

            gh repo clone valyala/fasthttp

          • sshUrl


          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link