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Hi @bagderI am using curl with --http3-only option to download file from nginx server.From below curl man page and help page i came to know that using --http3 will allow to fall back ,--http3-only will not allow to fallback but seems to be with --http3-only also curl is falling back and using http1.1man curl:---http3-onlysion on its own. Use --http3 for similar functionality with a fallback.Instructs curl to use HTTP/3 to the host in the URL, with no fallback to earlier HTTP versions.This option will make curl fail if a QUIC connection cannot be established, it will not attempt any other HTTP version on its own --http3 Use --http3-only for similar functionality without a fallback.Tells curl to try HTTP/3 to the host in the URL, but fallback to earlier HTTP versions if the HTTP/3 connection establishment failscurl --help all :---http3 Use HTTP v3--http3-only Use HTTP v3 onlyroot@ubuntu:~# curl -# -v -k --http3-only -o index.html 127.0.0.1:443...Connected to 127.0.0.1 (127.0.0.1) port 443 (#0)ALPN: offers http/1.1} [5 bytes data]TLSv1.3 (OUT), TLS handshake, Client hello (1):} [512 bytes data]TLSv1.3 (IN), TLS handshake, Server hello (2):{ [88 bytes data]TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):} [1 bytes data]TLSv1.3 (OUT), TLS handshake, Client hello (1):} [512 bytes data]TLSv1.3 (IN), TLS handshake, Server hello (2):{ [155 bytes data]TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):{ [21 bytes data]TLSv1.3 (IN), TLS handshake, Certificate (11):{ [768 bytes data]TLSv1.3 (IN), TLS handshake, CERT verify (15):{ [264 bytes data]TLSv1.3 (IN), TLS handshake, Finished (20):{ [52 bytes data]TLSv1.3 (OUT), TLS handshake, Finished

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NoticeThe URL of the result image is valid for 1 hour. Please download the image file promptly.Supported ImagesFormatResolutionFile sizejpg, jpeg, bmp, png, webp, tiff, tif, bitmap, raw, rgb, jfif, lzwUp to 4096 x 4096Up to 15MBGet StartedSee differences between the 3 API call types #Create a task.curl -k ' \-H 'X-API-KEY: YOUR_API_KEY' \-F 'sync=0' \-F 'image_url=YOU_IMG_URL'#Get the cutout result#Polling requests using the following methods 1. The polling interval is set to 1 second, 2. The polling time does not exceed 30 secondscurl -k ' \-H 'X-API-KEY: YOUR_API_KEY' \php//Create a task$curl = curl_init();curl_setopt($curl, CURLOPT_URL, ' CURLOPT_HTTPHEADER, array( "X-API-KEY: YOUR_API_KEY", "Content-Type: multipart/form-data",));curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);curl_setopt($curl, CURLOPT_POST, true);curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($curl, CURLOPT_POSTFIELDS, array('sync' => 0, 'image_url' => "YOUR_IMG_URL"));$response = curl_exec($curl);$result = curl_errno($curl) ? curl_error($curl) : $response;curl_close($curl);$result = json_decode($result, true);if ( !isset($result["status"]) || $result["status"] != 200 ) { // request failed, log the details var_dump($result); die("post request failed");}// var_dump($result);$task_id = $result["data"]["task_id"];//get the task result// 1、"The polling interval is set to 1 second."//2 "The polling time is around 30 seconds."for ($i = 1; $i 30; $i++) { if ($i != 1) { sleep(1); } $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, " curl_setopt($curl, CURLOPT_HTTPHEADER, array( "X-API-KEY: YOUR_API_KEY", )); curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); $response = curl_exec($curl); $result = curl_errno($curl) ? curl_error($curl) : $response; curl_close($curl); var_dump($result); $result = json_decode($result, true); if ( !isset($result["status"]) || $result["status"] != 200 ) { // Task exception, logging the error. //You can choose to continue the loop with 'continue' or break the loop with 'break' var_dump($result); continue; } if ( $result["data"]["state"] == 1 ) { // task success var_dump($result["data"]["image"]); break; } else if ( $result["data"]["state"] 0) { // request failed, log the details var_dump($result); break; } else { // Task processing if ($i == 30) { //Task processing, abnormal situation, seeking assistance from customer service of picwish } }}public static void main(String[] args) throws Exception { String taskId = createTask(); String result = pollingTaskResult(taskId, 0); System.out.println(result);}private static String createTask() throws Exception { OkHttpClient okHttpClient = new OkHttpClient.Builder().build(); RequestBody requestBody = new MultipartBody.Builder() .setType(MultipartBody.FORM) .addFormDataPart("image_url", "IMAGE_HTTP_URL") .addFormDataPart("sync", "0") .build(); Request request = new Request.Builder() .url(" .addHeader("X-API-KEY", "YOUR_API_KEY") .post(requestBody) .build(); Response response = okHttpClient.newCall(request).execute(); JSONObject jsonObject = new JSONObject(response.body().string()); int status = jsonObject.optInt("status"); if (status != 200) { throw new Exception(jsonObject.optString("message")); } return jsonObject.getJSONObject("data").optString("task_id");}private static String pollingTaskResult(String taskId, int pollingTime) throws Exception { if (pollingTime >= 30) throw new IllegalStateException("Polling result timeout."); OkHttpClient okHttpClient = new OkHttpClient.Builder().build(); Request taskRequest = new Request.Builder() .url(" + taskId) .addHeader("X-API-KEY", "YOUR_API_KEY") .get() .build(); Response taskResponse = okHttpClient.newCall(taskRequest).execute(); JSONObject jsonObject = new JSONObject(taskResponse.body().string()); int state = jsonObject.getJSONObject("data").optInt("state"); if (state 0) { // Error. throw new Exception(jsonObject.optString("message")); } if (state == 1) { // Success and get result. return jsonObject.getJSONObject("data").toString(); } Thread.sleep(1000); return pollingTaskResult(taskId, ++pollingTime);}const request = require("request");const fs = require("fs");const path = require('path')const API_KEY = "YOUR_API_KEY";(async function main() { const taskId = await createTask() const result = await polling(() => getTaskResult(taskId)) console.log(`result: ${JSON.stringify(result, null, 2)}`)})()const polling = async (fn, delay = 1 * 1000, timeout = 30 * 1000) => { if (!fn) { throw new Error('fn is required') } try

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`json:"task_id"` Image string `json:"image"` ReturnType uint `json:"return_type"` Type string `json:"type"` Progress uint `json:"progress"` //不确定有没有，需要查询看看 State int `json:"state"` TimeElapsed float64 `json:"time_elapsed"` } `json:"data"`}func main() { // JSON data is passed and received here, and code modification is required. jsonData := `{ "status": 200, "message": "Success", "data": { "task_id": "123456", "image": "image_data", } }` // Parse JSON data into VisualScaleResponse struct var response VisualScaleResponse err := json.Unmarshal([]byte(jsonData), &response) if err != nil { fmt.Println("Error parsing JSON:", err) return } // Query the relevant content in the database based on the taskID and associate it with the image below. fmt.Println("Image:", response.Data.TaskId) // Print the 'image' field fmt.Println("Image:", response.Data.Image)} #Create a taskcurl -k ' \-H 'X-API-KEY: YOUR_API_KEY' \-F 'sync=0' \-F 'image_file=@/path/to/image.jpg'#Get the cutout result#Polling requests using the following methods 1. The polling interval is set to 1 second, 2. The polling time does not exceed 30 secondscurl -k ' \-H 'X-API-KEY: YOUR_API_KEY' \php//Create a task$curl = curl_init();curl_setopt($curl, CURLOPT_URL, ' CURLOPT_HTTPHEADER, array( "X-API-KEY: YOUR_API_KEY", "Content-Type: multipart/form-data",));curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);curl_setopt($curl, CURLOPT_POST, true);curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($curl, CURLOPT_POSTFIELDS, array('sync' => 0, 'image_file' => new CURLFILE("/path/to/image.jpg")));$response = curl_exec($curl);$result = curl_errno($curl) ? curl_error($curl) : $response;curl_close($curl);$result = json_decode($result, true);if ( !isset($result["status"]) || $result["status"] != 200 ) { // request failed, log the details var_dump($result); die("post request failed");}// var_dump($result);$task_id = $result["data"]["task_id"];//get the task result// 1、"The polling interval is set to 1 second."//2 "The polling time is around 30 seconds."for ($i = 1; $i 30; $i++) { if ($i != 1) { sleep(1); } $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, " curl_setopt($curl, CURLOPT_HTTPHEADER, array( "X-API-KEY: YOUR_API_KEY", )); curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); $response = curl_exec($curl); $result = curl_errno($curl) ? curl_error($curl) : $response; curl_close($curl); var_dump($result); $result = json_decode($result, true); if ( !isset($result["status"]) || $result["status"] != 200 ) { // Task exception, logging the error. //You can choose to continue the loop with 'continue' or break the loop with 'break' var_dump($result); continue; } if ( $result["data"]["state"] == 1 ) { // task success var_dump($result["data"]["image"]); break; } else if ( $result["data"]["state"] 0) { // request failed, log the details var_dump($result); break; } else { // Task processing if ($i == 30) { //Task processing, abnormal situation, seeking assistance from customer service of picwish } }}public static void main(String[] args) throws Exception { String taskId = createTask(); String result = pollingTaskResult(taskId, 0); System.out.println(result);}private static String createTask() throws Exception { OkHttpClient okHttpClient = new OkHttpClient.Builder().build(); RequestBody requestBody = new MultipartBody.Builder() .setType(MultipartBody.FORM) .addFormDataPart("image_file", JPG_FILE_NAME, RequestBody.create({JPG_FILE}, MediaType.parse("image/jpeg"))) .addFormDataPart("sync", "0") .build(); Request request = new Request.Builder() .url(" .addHeader("X-API-KEY", "YOUR_API_KEY") .post(requestBody) .build(); Response response = okHttpClient.newCall(request).execute(); JSONObject jsonObject = new JSONObject(response.body().string()); int status = jsonObject.optInt("status"); if (status != 200) { throw new Exception(jsonObject.optString("message")); } return jsonObject.getJSONObject("data").optString("task_id");}private static String pollingTaskResult(String taskId, int pollingTime) throws Exception { if (pollingTime >= 30) throw new IllegalStateException("Polling result timeout."); OkHttpClient okHttpClient = new OkHttpClient.Builder().build(); Request taskRequest = new Request.Builder() .url(" + taskId) .addHeader("X-API-KEY", "YOUR_API_KEY") .get() .build(); Response taskResponse = okHttpClient.newCall(taskRequest).execute(); JSONObject jsonObject = new JSONObject(taskResponse.body().string()); int state = jsonObject.getJSONObject("data").optInt("state"); if (state 0) { // Error. throw new Exception(jsonObject.optString("message")); } if (state == 1) { // Success and get result.. 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GET request method and will not download the body of the HTTP response message. Curl GET HTTP headers example curl -I Getting JSON using Curl To receive data in JSON format with Curl, you must pass the "Accept: application/json" HTTP header to the server. If you do not pass this header, the server may automatically choose your client's most appropriate data type and return the data in a different format. The following is an example of getting JSON from a ReqBin echo URL: Curl GET JSON example curl -H "Accept: application/json" Checking if the target URL supports HTTP/2 using Curl To check if the target URL supports HTTP/2 using Curl, you can send a Curl HEAD request along with the --http2 command line parameter. Curl HTTP/2 support check curl -I --http2 In the response, you will see the HTTP/2 200 status line if your server supports the HTTP/2 protocol or HTTP/1.1 200 otherwise. Sending cookies along with a GET request using Curl You can send cookies to the server using the -b command-line option followed by a string with the cookie or the name of the file containing the cookies. Curl GET Request Example with Cookies curl -b "session=eJwlzj0wMQG7eO4Q" Getting a specific range of bytes from a resource using Curl To get a specific range of resource bytes from a target URL using Curl, you can use the -r command line option. Curl example to get a specific range of bytes curl -r 0-15000 Limiting the maximum transfer rate for Curl GET requests You can use the-- limit-rate command line option to limit the maximum transfer rate for uploading and downloading files in Curl. By default, the speed is measured in bytes per second, but you can specify the speed in kilobytes (K), megabytes (M), or gigabytes (G) using a

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You can use the Wowza Streaming Engine™ REST API to create and manage applications in Wowza Streaming Engine media server software. This article shows how to use cURL to query the REST API to create and manage a live streaming application.Notes: Wowza Streaming Engine 4.3.0 or later is required. PHP examples for the tasks in this article are available in the tests folder of the PHP REST Library for Wowza Streaming Engine on GitHub. Reference documentation for the Wowza Streaming Engine REST API is available by using OpenAPI (Swagger), which you can download and install locally. See Access reference documentation for the Wowza Streaming Engine REST API.Create an applicationCreate an application for live streaming with Wowza Streaming Engine default settings. curl - X POST \-H 'Accept:application/json; charset=utf-8' \-H 'Content-Type:application/json; charset=utf-8' \ \-d'{ "restURI": " "name": "testlive", "appType": "Live", "clientStreamReadAccess": "*", "clientStreamWriteAccess": "*", "description": "A basic live application", "streamConfig": { "restURI": " "streamType": "live" }}'This example creates an application named testlive.curl - X POST \-H 'Accept:application/json; charset=utf-8' \-H 'Content-Type:application/json; charset=utf-8' \ \-d'{ "restURI": " "name": "testlive", "appType": "Live", "clientStreamReadAccess": "*", "clientStreamWriteAccess": "*", "description": "A basic live application", "streamConfig": { "restURI": " "streamType": "live" }}'The command should return a response that looks something like this:{ "success": true, "message": "Application (testlive) created successfully."}You could also create the application testlive with password authentication by adding securityConfig and ModuleCoreSecurity to the request:curl -X POST \-H 'Accept:application/json; charset=utf-8' \-H 'Content-Type:application/json; charset=utf-8' \ \-d'{ "restURI": " "name": "testlive", "appType": "Live", "description": "A live application with password authentication", "streamConfig": { "restURI": " "streamType": "live" }, "securityConfig": { "restURI": " "secureTokenVersion": 0, "clientStreamWriteAccess": "*", "publishRequirePassword": true, "publishPasswordFile": "", "publishRTMPSecureURL": "", "publishIPBlackList": "", "publishIPWhiteList": "", "publishBlockDuplicateStreamNames": false, "publishValidEncoders": "", "publishAuthenticationMethod": "digest", "playMaximumConnections": 0, "playRequireSecureConnection": false, "secureTokenSharedSecret": "", "secureTokenUseTEAForRTMP": false, "secureTokenIncludeClientIPInHash": false, "secureTokenHashAlgorithm": "", "secureTokenQueryParametersPrefix": "", "secureTokenOriginSharedSecret": "", "playIPBlackList": "", "playIPWhiteList": "", "playAuthenticationMethod": "none" }, "modules": { "restURI": " "moduleList": [{ "order": 0, "name": "base", "description": "Base", "class": "com.wowza.wms.module.ModuleCore" }, { "order": 1, "name": "logging", "description": "Client Logging", "class": "com.wowza.wms.module.ModuleClientLogging" }, { "order": 2, "name": "flvplayback", "description": "FLVPlayback", "class": "com.wowza.wms.module.ModuleFLVPlayback" }, { "order": 3, "name": "ModuleCoreSecurity", "description": "Core Security Module for Applications", "class": "com.wowza.wms.security.ModuleCoreSecurity" }] }}'Here's how you would create the application testlive with password authentication and a live stream packetizer enabled:curl -X POST \-H 'Accept:application/json; charset=utf-8' \-H 'Content-Type:application/json; charset=utf-8' \ \-d'{ "restURI": " "name": "testlive", "appType": "Live", "description": "A live application with password authentication and packetizers", "streamConfig": { "restURI": " "streamType": "live", "liveStreamPacketizer": [ "cupertinostreamingpacketizer" ] }, "securityConfig": { "restURI": " "secureTokenVersion": 0, "clientStreamWriteAccess": "*", "publishRequirePassword": true, "publishPasswordFile": "", "publishRTMPSecureURL": "", "publishIPBlackList": "", "publishIPWhiteList": "", "publishBlockDuplicateStreamNames": false, "publishValidEncoders": "", "publishAuthenticationMethod": "digest", "playMaximumConnections": 0, "playRequireSecureConnection": false, "secureTokenSharedSecret": "", "secureTokenUseTEAForRTMP": false, "secureTokenIncludeClientIPInHash": false, "secureTokenHashAlgorithm": "", "secureTokenQueryParametersPrefix": "", "secureTokenOriginSharedSecret": "", "playIPBlackList": "", "playIPWhiteList": "", "playAuthenticationMethod": "none" }, "modules": { "restURI": " "moduleList": [{ "order": 0, "name": "base", "description": "Base", "class": "com.wowza.wms.module.ModuleCore" }, { "order": 1, "name": "logging", "description": "Client Logging", "class": "com.wowza.wms.module.ModuleClientLogging" }, { "order": 2, "name": "flvplayback", "description": "FLVPlayback", "class": "com.wowza.wms.module.ModuleFLVPlayback" }, { "order": 3, "name": "ModuleCoreSecurity", "description": "Core Security Module for

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CURL is an extremely powerful command line tool used to transfer data with URL syntax. Known for its versatility, flexibility and ubiquity, curl allows you to quickly interact with web servers, APIs, and services from the comfort of your terminal.While most Linux distributions ship with a version of curl pre-installed, it is often dated and lacks recently added capabilities. As a data scientist and infrastructure engineer with over 10 years of experience building and deploying analytical pipelines, I highly recommend compiling the latest curl from source. Doing so provides you access to new features, security enhancements, performance improvements and support for cutting-edge protocols that can supercharge your data projects.In this comprehensive, 2845+ word guide, you‘ll learn how to build the most up-to-date curl from source code on both CentOS/RHEL and Ubuntu systems. I provide unique expert insights optimized specifically for data analytics use cases across the entire installation process.Why Compile the Latest curl for Data Tasks?Here are some key reasons why installing curl from source is advantageous for data tasks:Faster Data Transfer : New protocols like HTTP/3, FTP3 provide upto 2x speed improvements for moving datasets across endpoints.Accelerated Model Serving: HTTP/3‘s QUIC transport minimizes latency between API and ML model servers via connection migration.Reproducible Pipelines: Version pinning and lockfiles prevent unplanned breakages across vast data ecosystems. Enhanced Debugging : Gain visibility into all network events when transferring petabyte-scale data.Reduced Downtime: Regular updates close security loopholes that may interrupt analytical workflows.Granular Control: Fine-tune and customize curl to best suit your specific data infrastructure needs.Clearly, having full control over the curl build process enables availing new capabilities to supercharge your AI/analytics pipelines through maximized speed, security and reproducibility.Prerequisites for Optimized Data ProcessingWe‘ll be building the latest curl 7.67.0 released on Jan 15, 2020 at the time of writing. For optimized data processing ensure your system meets these requirements:CentOS/RHELUse the latest CentOS 8.x/RHEL 8.x distribution:$ uname -r4.18.0-305.el8.x86_64GCC 10+ compiler: Enables advanced optimizations Fast NVMe storage: Speeds up build I/O 8 GB RAM: Cater to high memory buildsMulti-core CPU: Leverage parallelismUbuntuUbuntu 22.04 LTS or later:$ uname -r 5.15.0-52-genericSimilar fast storage, ample RAM and multi-core resources recommended.Now let‘s get building!Step 1 – Download Using Fastest MirrorAlways download source tarballs from the fastest available mirror near you leveraging utilities like netselect-apt for accelerated transfers:$ netselect-apt get the archive:$ wget -c $(netselect-apt checksums match for integrity assurance. Corrupted downloads can severely impact build reproducibility.Step 2 – Extract. Using PHP CURL to download a file. 2. cURL download file via browser. 11. Download file from URL using CURL. 0. php curl save download file. 0. php curl download file from url. Hot