Curl websocket upgrade request. The request take forever to complete.

Curl websocket upgrade request Connection specifies that Upgrade is a hop-by-hop header (headers that intermediaries should consume, A WebSocket request is done as an HTTP/1 GET request with an "Upgrade WebSocket" request header field. com (1. 85. if [ -n "${flow_value_raw} ] checks if the string variable non-empty - if non-empty, i. 1 > Accept: */* > Upgrade: websocket > Connection: Upgrade > * Empty reply from server * Connection #0 to host localhost left intact curl: (52) Empty reply from server * Closing connection 0 javascript; Thanks for tips. WebSockets. The 426 response means that initial handshake is not requesting a proper WebSocket upgrade. 1" {master url:port/pod/exec} availability of the "Upgrade: websocket" header in the request (see new patch). Provide details and share your research! But avoid . ch > Sec-WebSocket-Key: MIN4DsiwEAutsE11kgG5rg== > Upgrade: websocket > Connection: Upgrade > Sec-WebSocket-Version: 13 > < HTTP/1. websocket. Hi, Is there a way to force curl to automatically close the connection on the client side for servers that refuse to do it? The Connection: Close header This commit reapplies PR kubernetes-client#120 that was removed by kubernetes-client#353. But maybe it would be better to enable it explicitly with a config option. I'm sure my nginx config is correct and my program is working prop Skip to main #for be sure proxy_set_header Connection "Upgrade"; #this is ok Request; curl -v 'https://mywebsocketserver. 0 > Accept: */* > Origin: https://immersive. 0 and 7. Correct. Several days ago now, all of my attempts My test is a simple curl request: curl -i -N -H "Connection: Upgrade" -H "Upgrade: websocket" -H "Host: Because of the invalid WebSocket upgrade request you are sending, the request will pass through the WebSocketUpgradeFilter without upgrading resulting in your 404. 0. twisted. Unlike other pure python http clients like httpx or requests, curl_cffi can impersonate browsers' TLS/JA3 and HTTP/2 fingerprints. We use this header, and need it also for web sockets upgrade requests. 1 protocol provides a special mechanism that can be used to upgrade an already established connection to a different protocol, using the Upgrade header field. 前文相关： • . Live Chat Application: Utilize curl to establish WebSocket connections and send/receive messages Re: better handling of websocket protocol upgrades This message : [ Message body ] [ More options ] Related messages : [ Next message ] [ Previous message ] [ In reply to ] Now, let us delve into the components of this command to unveil its hidden magic:--include: Instruct curl to include the response headers in the output, allowing you to see the WebSocket handshake details. Support; URLs; Concept; WebSocket in curl URL. And it has 2 main endpoints: / - serves index. 1 as that is now the standard for websocket connections thru HTTP. In general, this works perfectly fine. 10. implementation to handle the initial HTTP Upgrade handshake. # attached file is dummy code add a easy handle wich represent your UPGRADE http request, > with CURLOPT do the following to detach the connection > curl_easy_pause(easy_handle, CURLPAUSE_ALL); > curl_easy_setopt(easy_handle 文章浏览阅读8k次。昨日的文章没指出websocket请求协商切换的精髓，删除重发。前文相关：•. 0 (x86_64-pc-linux-musl) libcurl/8. values were with 'USE_WEBSOCKETS'. The curl_ws_recv function has this prototype: This is a perfect valid response from a server, possible causes can be: You did not specify the credentials needed for this API endpoint; You did not provide some authentication header The notable exception is websockets. A WebSocket client application sets up a connection with an HTTP request that upgrades into WebSocket - and once upgraded, the involved parties speak WebSocket over that connection $ wurl -i wss://echo. A WebSocket client application sets up a connection with an HTTP request that upgrades into WebSocket - and once upgraded, the involved parties speak WebSocket over that connection until it is done and the connection is closed. After a short loo Supports asyncio with proxy rotation on each request. inspired by the POC from @chekolyn * Adds a new requirement on websocket-client * Add a new class WSClient that uses WebSocketApp from the websocket-client. 1 > Host: websocket-test-lb. * Make sure we pass Authorization header * Make sure we honor the Also when I make it http and add headers to upgrade to websocket it works with curl_easy_perform but when I try to do it with curl_multi_perform it doesn't send any request to the server as much as I saw in the network logs. 2. [A] http-request: [A] Issue HTTP request, receive a 1xx or 2xx reply, then pass http-post-sse: [A] Accept HTTP/1 request. server import ( Site, ) from twisted. If you are blocked by some website for no obvious reason, you can give curl_cffi a try. NET WebSockets 核心原理初体验 • SignalR 从开发到生产部署避坑指南. html /stream - websocket endpoint that serves the content of your app and receives commands from the app. > I tried to let the HTTP request and response be handled "normally" by > setting up the request parameters (url, headers, ) on the easy_handle and > use curl_multi_perform() to work it's magic. HTTP is fine and the Route is working, but the issue is my upstream does not support websocket upgrade call i. I am unable to get 'curl_ws_send' to work. "WS" is for cleartext communication over HTTP and "WSS" is for doing WebSocket securely over HTTPS. * Verify Sec-WebSocket-Extensions and Sec-WebSocket-Protocol in the response The other items would apply equally to servers and would make server use that much better. 7 if you are on Windows. e. haxx. 文章浏览阅读1. Supports asyncio with proxy rotation on each request. If the connect-only option was set, the transfer ends after the WebSocket has been setup to the remote host and from that point the application needs to call curl_ws_recv() to read WebSocket data and curl_ws_send() to send it. 15. 13. When using wss://to do WebSocket over HTTPS, thestandard TLS and HTTPS options are acknowledged for the CA, verificationof See more It is designed to make easy to do tricky things with websockets. NET WebSockets 核心原理初体验[1]•SignalR 从开发到生产部署避坑指南[2]tag：浏览器--->nginx--> server其中提到nginx默认不会为客户端转发Upgrade、Connection标头[3]， 因为为了让被代理的后端服务器知道客户端要升级 I created basic websocket php to check and when i call the test file. I am not using any 3rd party websocket libraries. set_exception (curl: Curl, exception) [source] ¶ ```bash curl --incl Documentation. resource import ( Resource, ) from autobahn. Been referring to the below: --no-buffer \ --header "Connection: From: Frdric Germain <frederic. 64. tag：浏览器--->nginx--> server. Howard via curl-library <curl-library_at_lists. I'd love to do it myself; would it be accepted if I did it up to the standards of the Curl project? i am not entirely sure what you mean or seek. At least not with the > multi-interface. Back To Course Home. 13 libssh2/1. The result that I expect is the result from the webSocket will be later printed or "echo" to the PHP page. Is there a better way to refuse websocket upgrade request, other than return http code like 400? cURL request for Socket IO on Node (Express) Ask Question Asked 5 years (#0) > GET / HTTP/1. Scrapfly also unlocks the observability by providing an analytical dashboard and measuring the success rate/block rate Websocket: fixes for partial frames and buffer updates; websockets: fix handling of partial frames; windows: fail early with a missing windres in autotools; windows: fix linking . Is there any way to tell curl to exit after that successful handshake? > Upgrade itself, and then takeover the connection. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I can accomplish the upgrade with the curl_easy_setopt(Curl, CURLOPT_CONNECT_ONLY, 2l). To initiate a WebSocket session with libcurl, setup an easy handle to use a URL with a "WS://" or "WSS://" scheme. 8k次。昨日的文章没指出websocket请求协商切换的精髓，删除重发。前文相关：•. 54. 55. 1 Connection: Upgrade Host: echo. com > User-Agent: curl/7. By the way, the initial upgrade request is the only request related to WebSockets that URLProtocol can see. First, how does the websocket protocol work in a few words? A client connects to a server, sends a handshake request, 服务器认可这是websocket请求，服务端处理逻辑没改，故按照http代码逻辑返回200ok和JSON数据。 真正要让服务端按照websocket姿势， 要使用HttpContext. NET WebSockets 核心原理初体验[1]•SignalR 从开发到生产部署避坑指南[2]tag：浏览器--->nginx--> server其中提到nginx默认不会为客户端转发Upgrade、Connection标头[3]， 因为为了让被代理的后端服务器知道客户端要升 From: supraja sridhar <suprajasridhar95_at_gmail. You can check availability of a web socket without transferring any data: $ websocat -q -uU Upgrade makes it switch from HTTP (s) to the websocket protocol. an infinite loop. 8. Libcurl does have the raw API, so I already can, but that would mean duplicating the WebSocket parsing. I lost a few hours trying to figure out why these headers were disappearing when debugging my httpd web socket rewrite rules for The upgrade request for opening a websocket connection is a standard HTTP request. The latter one being the secure version done over HTTPS. A WebSocket request is done as an HTTP/1 GET request with an "Upgrade WebSocket" request header field. What does libcurl do for the 'curl_ws_send' request? Do I need other curl_easy_setopt before doing the 'curl_ws_send'? How to refuse websocket upgrade request properly, and let client be able to receive the returned reason/data ? (e. WebSocket communication with libcurl is done by setting up a transfer to a URL using the ws: Set CURLOPT_CONNECT_ONLY to 2L (new for WebSocket), which makes libcurl do an HTTP GET + Upgrade: request plus response in the curl_easy_perform() call before it returns and then you can use curl_ws_recv() I am following the example in the documentation for using process_request for a simple health check type response. any whay i can tell curl to just get one value from respond. 5 in the cluster. ; Real-Time Data Feeds: Streaming live data updates, such as stock prices or sports scores. Python binding for curl-impersonate via cffi. Feature matrix # the js3n fingerprint should be the same as target browser # To keep using the latest browser version as `curl_cffi` updates, # simply set add_handle (curl: Curl) [source] ¶ Add a curl handle to be managed by curl_multi. If you are using Tomcat as servlet container you can extend TomcatRequestUpgradeStrategy class and provider your own logic how to handle websocket upgrade. As far as I can tell, the sole server-only API that libcurl might need would be in handling the upgrade request. 1 101 Switching Protocols response, and be able to read this response headers. Sorry I wrote a cURL API But I think it gives introduction to what we could wait from libcurl adding - a command to create the upgrade request opening the websocket - a command to send a frame On 30 avr. se> Date: Mon, 27 Jan 2025 18:57:58 +0000 > > After rereading RFC 6455, and looking at the Curl Websocket API, I think > > that the only API change would be to add something like `CURLWS_SERVER` to I send an HTTP request to do the handcheck, and receive an HTTP 101 as expected : HTTP/1. 1 404 Not Found < Server: nginx/1. 1 Release-Date: 2023-09-13 Protocols: dict file ftp ftps gopher gophers http https imap imaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp ws wss Features: alt-svc AsynchDNS HSTS HTTP2 HTTPS-proxy IPv6 Largefile libz NTLM 【深度】阿里巴巴万级规模 K8s 集群全局高可用体系之美. Thereby treating the entire session as a form of download from the server. Supports websocket. 1 to https curl request. Are you sure you're configuring it correctly? Perhaps you could provide a code snippet for us to verify. org" --header "Origin: wss://echo. But of course there will be a minimum of checks that have to be performed before libcurl The problem is that websocket needs the Upgrade header to work properly. 84. So far I also didn't consider yet to check the correctness of the "Sec-WebSocket-Accept" header. To see a bit more detail with CURL you’ll need a few flags, specifically: Test a WebSocket using curl. so i am trying to respond to. 86. It can decide to use the regular write callback to receive incoming data, and respond to that data in or outside of the callback with curl_ws_send. 0, 7. " The actual upgrade is delegated to a server-specific RequestUpgradeStrategy, which will update the response as necessary and initialize the WebSocket. 6 on Windows are all wrong, you should update to 0. org:443 Sec-WebSocket-Version: 13 Sec-WebSocket-Key: bIkIvw9EcchOo931ELJpOg== Upgrade: 1) add a easy handle wich represent your UPGRADE http request, with CURLOPT_HEADERFUNCTION set 2) on the last last header, do the following to detach the To establish a WebSocket connection using curl, use the following command: 2 --header "Connection: Upgrade" \ 3 --header "Upgrade: websocket" \ 4 --header "Host: example. 3. 1 to your curl command. . Hello all, I'm new here :) I'm writing because I found a way do kind of HTTP UPGRADE requests when we use multi handle, but as I'm wondering if To initiate a WebSocket session with libcurl, setup an easy handle to use a URL with a "WS://" or "WSS://" scheme. （because I need client send first frame, and need to know the response headers everything there is to know about curl, libcurl and the cURL project. The callback approach. You switched accounts on another tab or window. The same code works with 7. 1 of curl. 1 200 OK < Server: nginx/1. For that, there needs to be: * Verify: * Request-URI * Host * Origin Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company From: Gavin D. So -- Am I missing something, or is it really impossible 这样我们就明白了，虽然websocket协议基于http，添加了http Connection 、 Upgrade 协商标头，但是浏览器实际会给我们带上 Sec-WebSocket-Key [5] 、 深入解析：使用Curl发送WebSocket请求的完整指南本文将详细介绍如何使用Curl发送WebSocket请求，包括WebSocket协议的基本概念、Curl的基本使用方法以及发送WebSocket请求的具体步骤。通过本文的学习，您将能够轻松掌握使用Curl进行WebSocket通信的技巧。一、WebSocket协议简介WebSocket是一种在单个长连接上进行 Because I can’t find any resources online for debugging WebSockets I’m going to add my own voice. > GET / HTTP/1. 1. if the gateway send GET /my-test to upstream for the upgrade, it will fail because my upstream does not allow GET method. I was wondering if the server portion of WebSockets could be implemented minus the upgrade. AcceptWebSocketAsync()告知客户端开始切换协议，返回101响应码，并在原tcp上发起全双工通信。. ; If you want to see what’s happening in /stream you need to use a websocket-specific Describe the bug Don't work https via curl. Lets try to upgrade our WebSocket by following step by step instructions. A libcurl application can do WebSocket using one of these two different approaches below. 0 < Date: Sat, 09 Feb 2019 21:12:11 GMT < Content-Type: text/plain < Description: For web socket upgrade requests, Envoy doesn't set the upstream response time. upgrade:websocket: the client is not using the websocket protocol: Workaround: add option --http1. So suppose I send an http get, then open a websocket, then send a normal http get again the browser would then have to open a new client socket because the old one is already converted to websocket and I assume it stays that way forever now and the serverside on that 完全では無いですがメモcurl -i -N -H "Connection: keep-alive, Upgrade" -H "Upgrade: websocket" -H "Sec-WebSock libcurl for the server portion of WebSockets. Is there a way to make it work with curl in php? WebSocket upgrade requests should be seen by canInit. --no-buffer: Configure curl to not buffer the response, ensuring real-time interaction with the WebSocket server. add the header on for hop-to-hop to upstream server). I’ve also been using “kubectl exec” for various purposes, also without any real trouble. 28. a while-loop where the condition is true will continue indefinitely. 3 zlib/1. html When proxying requests from port 80 to port 8080, I notice (using tcpdump and Wireshark) that the Upgrade header has been removed and Connection: Keep-Alive has been set instead. websocket import ( WebSocketServerProtocol, WebSocketServerFactory, ) from autobahn. Also, if I Postman websocket directly to the upstream, then it works. 8k次，点赞26次，收藏13次。cURL（Client URL）是一个开源的命令行工具和库，用于传输数据。它支持多种协议，包括但不限于HTTP、HTTPS、FTP、SFTP、SCP等，是Web开发者和网络管理员的得力助手。cURL的强大之处在于其灵活性和广泛的协议支持，几乎可以处理任何网络通信需求。 I found out that this has to do with http2, because Kubernetes exec uses SPDY, the problem went away when I upgraded to curl version > 7. Building Real-time Applications with Phoenix & Elixir. Reload to refresh your session. I’m using v1. Is libcurl well suited for receiving a HTTP request, building a HTTP response, and sending the HTTP response back? I'm not so sure. the output from curl is saved in flow_value_raw. You signed out in another tab or window. ifelse. The fingerprints in 0. curl_ws_recv. 其中提到nginx默认不会为客户端转发Upgrade、Connection标头， 因为为了让被代理的后端服务器知道客户端要升级协议，故要在nginx上显式转发标头： # 以下为 /realtime/路径请求添加 Connection > GET /cable HTTP/1. Log In Join for free. Ask questions and share your thoughts on the future of Stack Overflow. 1. domain. I expected the following All I need I to send message to the process and close the connection. Implementations can choose not to take advantage of an upgrade even if they support the new protocol, and in Full list of overlays: ws-upgrade: WebSocket upgrader / raw server. io (depending on the server you might need to provide Origin and/or Connection: Upgrade). Live Chat Applications: Enabling real-time messaging between users. This mechanism is optional; it cannot be used to insist on a protocol change. You want to send websocket data after the switch has succeeded so you want to know when you can do that? Yes, a callback after serverHTTP/1. curl -H "Connection: upgrade" -H "Upgrade: SPDY/3. 0, but it stops from 7. I’ve been using kubectl on Windows 10 in Cygwin for a long time to connect to our clusters. 0 OpenSSL/3. ch > User-Agent: curl/7. Asking for help, clarification, or responding to other answers. The plugin is refusing the request using the current protocol and it needs to be upgraded to Websocket++/0. 2010, at 14:25, Alexandre Morgaut wrote: > Hi Daniel, > > nice to meet you :-) > > 考虑到这里有一些关于curl的答案，尽管你可以使用curl建立连接但不能发送帧，我想要补充我的看法。我看到的curl答案是给了你一些命令，但没有解释它们。这是我想填补的空白。 简单说下websocket协议的工作原理：客户端连接到服务器，发送握手请求，接收到“101 Switching Protocols”（握手响应）之后 仅仅依靠Connection Upgrade就能认定为websocket了吗？ nononono， 仿造websocket请求是个技术活。 We have several k8s clusters we run within our firewall. But I don't understand why this is happening and why headers are lost without this option. I will try CURLWS_RAW_MODE. 36 and installed nghttp2 on the server. 1 -sSv https://ws. --header "Connection: Upgrade" and --header Oh okay, so every WebSocket class sends an Http Request if it wants to send binary data. web. On the server side, I can authenticate the request like any which would lead me to believe that it's impossible to use bearer authentication to authenticate a web socket upgrade request. resource import ( WebSocketResource, ) class I recommend adding --http1. 我想你是想把自己弄进吊舱里。如果您想要执行到一个吊舱中，则需要一个websocket连接。 对于websocket连接，首先进行http(s)调用，然后使用HTTP升级报头对websocket进行升级请求。 curl不支持从http升级到websocket。因此出现了错误。 The HTTP/1. 1 101 Switching Protocols Upgrade: websocket Connection: Upgrade Sec-WebSocket-Accept: qGEgH3En71di5rrssAZTmtRTyFk= My issue is that after receiving that response, curl will just hang. Streamlit uses two protocols to communicate between the browser and the server: HTTP and websocket. com/websocket). Join our first live community AMA this Wednesday, February 26th, at 3 PM ET. The Connection and Upgrade headers are not valid in http/2 and curl will use http/2 if your server supports it. 0 or before like attached file. I created a websocket client application with cURL 7. 0 > Accept: */* > Upgrade: websocket > Connection: Upgrade > < HTTP/1. You signed in with another tab or window. $ curl --include --no-buffer --header "Connection: Upgrade" --header "Upgrade: websocket" --header "Host: echo. I had noticed that problem is caused by call of curl_easy_perfo Use WebSocketResource to expose a WebSocketServerFactory as part of a Site. The request take forever to complete. This is the equivalent of perform in the async world. 作者 | 韩堂、柘远、沉醉来源 | 阿里巴巴云原生公众号 前言台湾作家林清玄在接受记者采访的时候，如此评价自己 30 多年写作生涯：“第一个十年我才华横溢，‘贼光闪现’，令周边黯然失色；第二个十年，我终于‘宝光现形’，不再去抢 If the curl API user requested HTTP2 or HTTP3, then prefer an Upgrade to http2 vs an Upgrade to websocket. com" \ Had a question about how to use CURL to initiate a WebSocket connection to a server to read from it. Is libcurl an improvement over the method that Beast uses to process the HTTP WebSocket Upgrade request (lines 306, 307): curl 8. example/abc' -H 'Upgrade: websocket' -H 'Connection: Upgrade Concept. WebSocket communication with libcurl is done by setting up a transferto a URL using the ws:// or wss://URLschemes. The easiest way to generate the cURL request is as follows: * TCP_NODELAY set * Connected to websocket-test-lb. 18. 5 (Ubuntu) < Date: Tue, 16 Apr 2019 20:10:43 GMT < Content Yes, a webSocket connection will always start with a GET request, not a POST or any other method. 0+ I'll make a educated guess here and say you have a network misconfiguration (most likely your reverse proxy) that's blocking the webui from properly communicating with the backend. 4) port 443 (#0) * SSL certificate verify ok. I followed the guide from official docs I call the test file from postman and postman stu Specifically, it will add a "Connection" header with value "Upgrade" and add an "Upgrade" header with whatever value the client passes to it in the "Upgrade" header (i. 0 nghttp2/1. rc to shared curl with autotools; winidn: drop WANT_IDN_PROTOTYPES; ws: if no connection is around, return error; ws: return CURLE_NOT_BUILT_IN when websockets not Related: #8073 As mentioned in the changelogs, you need a proper websocket support going forward with 0. from twisted. 5. 0 (cfilters introduced) till the latest one. WebSocketServerProtocol): async def process_request(self, path, request_headers): print(pa 文章浏览阅读1. Hi @Md_Asadul_Islam. If the upgrade request is not a GET request should the server handle it as a WebSocket upgrade request, should it pass it to be handled by the HTTP server or should it respond to it with a status code like 400 Bad Request ? So if you send the right headers for a websocket upgrade, it just times out because the http request is never finished by the server. After installing curl I was able to get the response by adding some headers. curl -i -H 'Connection: Upgrade' -H 'Upgrade: websocket' localhost:80/test. ; Sample Projects. I guess that's a bug rather than the intended behaviour. set_result (curl: Curl) [source] ¶ Mark a future as done for given curl handle. 1 > Host: immersive. 协商切换 服务器认可这是websocket请求，服务端处理逻辑没改，故按原http代码逻辑返回200ok和JSON数据。 真正要让服务端按照websocket姿势， 要使用HttpContext. com> Date: Sun, 26 Jan 2014 10:09:42 +0100. Is there an existing issue for this? I have searched the existing issues Describe the bug Context: A backend API with an integrated SignalR hub for server events sent from controller actions deployed as an app service to API Management. 0 on the client, and v1. 1 > Host: localhost:3000 > User-Agent: curl/7. AcceptWebSocketAsync()告知客户端开始切换 The WebSocket protocol starts with an HTTP-based request/response handshake where the client asks the server for permission to upgrade communications to full duplex WebSocket messaging. g client is js, server is go / gin / gorilla/websocket). remove_handle (curl: Curl) [source] ¶ Cancel a future for given curl handle. ; IoT Devices: Communicating with Internet of Things (IoT) devices for real-time monitoring and control. And when the response-headers Because if I understand right, the curl request tries to do a http and update it to a ws protocol Knowing this to establish a websocket connection with curl: $ curl -H 'Upgrade: websocket' \ -H "Sec-WebSocket-Key: `openssl rand -base64 16`" \ tl;dr curl -H 'Upgrade: websocket' -H "Sec-WebSocket-Key: `openssl rand -base64 16`" -H 'Sec-WebSocket-Version: 13' --http1. class ServerProtocol(websockets. When the upgrade is accepted by the server, it responds with a 101 Switching Here is an example of sending a WebSocket request using curl: In this example, we are setting the required headers (Upgrade, Connection, and Sec-WebSocket-Key) and specifying the WebSocket URL (ws://example. After the H2 connection is established, (or if there's already an h2 connection to that host), send a CONNECT request with the headers munged to fit the requirements of RFC 8441 to establish the h2 websocket stream. 87. germain_at_gmail. None of the subsequent exchanged messages trigger any of the URLProtocol methods. Feature matrix # the js3n fingerprint should be the same as target browser # To keep using the latest browser version as `curl_cffi` updates, # simply set impersonate="chrome" without specifying a version. GitHub Gist: instantly share code, notes, and snippets. com> Date: Fri, 16 Mar 2018 15:53:18 +0530. Specify your own protocol instead of usual TCP. Below is the original commit message. Hello, I’ve got a problem with version 8. org WebSocket upgrade request --- GET / HTTP/1. Each WebSocket fragment can be up to 63 bit in size. In the case of websockets, the Upgrade header will be "websocket. Altough it doesn't send any request curl_multi_perform return CURL_OK. In particular, this is a test request. websocket Scrapfly is an enterprise-grade solution providing Web Scraping API that aims to simplify the scraping process by managing everything: real browser rendering, rotating proxies, and fingerprints (TLS, HTTP, browser) to bypass all major anti-bots. tka eld mrfftjw gydpwzx vqqn ucbsl kdaa qkzizf fbfsr ivsiex yutv yoex eqbjqb ascuwkd qwmdyg