c++ http https post get

时间: 2023-05-02 18:06:28 浏览: 144

c# http post get

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The provided code snippet and description detail a custom `WebClient` implementation in C#. This class is designed to handle HTTP requests and responses, specifically focusing on GET and POST methods. It also includes advanced functionalities such as uploading files and handling progress events during uploads and downloads. ### Key Features 1. **Handling HTTP GET and POST Requests:** - The class provides methods to send both GET and POST requests to a server. - For GET requests, the `OpenRead` method is used, which can accept a URL and return the response text or stream. - For POST requests, the `OpenRead` method can also be used with an additional parameter for the data to be posted. 2. **Uploading Files:** - The `UploadFile` method is used to upload files to a server. - It supports sending both text fields and file fields as part of the request. - Progress events can be raised during the upload process. 3. **Downloading Data:** - Files can be downloaded from a server using the `DownloadFile` method, which saves the file to a specified path. - Data streams can also be downloaded and saved to a memory stream using the `DownloadData` method. - Progress events can be raised during the download process. 4. **Handling HTTPS Connections:** - The class includes a method `OpenReadWithHttps` that handles HTTPS connections and resolves certificate issues by using a custom certificate policy. 5. **Custom Events for Uploads and Downloads:** - Custom delegates (`WebClientUploadEvent` and `WebClientDownloadEvent`) are defined to handle upload and download progress events. - Structs `UploadEventArgs` and `DownloadEventArgs` encapsulate data related to the progress of these operations. 6. **Advanced Functionality:** - The class supports setting various HTTP headers, including custom headers for requests. - It also manages cookies, allowing the user to set and retrieve cookies for the requests. - The `StatusCode` property provides access to the HTTP status code returned by the server. ### Usage Examples #### Basic Usage ```csharp HttpProc.WebClient client = new HttpProc.WebClient(); client.Encoding = System.Text.Encoding.Default; string responseText = client.OpenRead("http://example.com"); Console.WriteLine(responseText); ``` #### Downloading a File ```csharp client.DownloadFile("http://example.com/file.zip", @"C:\Downloads\file.zip"); ``` #### Uploading a File ```csharp string response = client.UploadFile("http://example.com/upload", "file1=C:\\upload\\file.txt"); Console.WriteLine(response); ``` #### Handling Progress Events ```csharp client.UploadProgressChanged += (sender, e) => { Console.WriteLine($"Uploaded {e.bytesSent}/{e.totalBytes} ({e.sendProgress * 100}% complete)"); }; client.DownloadProgressChanged += (sender, e) => { Console.WriteLine($"Downloaded {e.bytesReceived}/{e.totalBytes} ({e.ReceiveProgress * 100}% complete)"); }; ``` ### Advanced Usage #### Sending POST Data ```csharp string postData = "username=john&password=demo"; string response = client.OpenRead("http://example.com/login", postData); Console.WriteLine(response); ``` #### Handling HTTPS Connections ```csharp string secureResponse = client.OpenReadWithHttps("https://secure.example.com", "data=sensitive"); Console.WriteLine(secureResponse); ``` ### Additional Notes - The class handles connection management, including opening and closing TCP connections. - It provides methods to cancel ongoing operations (`Cancel` and `Start`). - The class supports setting and retrieving the encoding used for requests and responses. This custom `WebClient` implementation offers a comprehensive solution for handling HTTP requests and responses in C#, making it suitable for various web-based applications.

C语言中的HTTP和HTTPS协议是用于网络通信的重要协议之一。它们常常与POST和GET方法一起使用。其中，HTTP是基于传输控制协议（TCP）的无状态协议，用于在Web服务器和客户端之间进行数据传输。而HTTPS则是在HTTP协议和SSL/TLS安全协议基础上的安全协议，它使用公钥和私钥来保护数据的传输安全。HTTP和HTTPS协议都可以使用POST和GET方法进行数据传输。 POST方法是HTTP协议中用于向服务器提交数据的一种方法。客户端通过POST方法向服务器提交数据，服务器处理数据后返回响应结果。POST方法通常用于提交表单数据、上传文件等操作。它可以传输大量数据，且不会在URL中暴露数据，用户提交的数据也不会被浏览器缓存。而GET方法则是HTTP协议中用于从服务器获取数据的一种方法。客户端通过GET方法向服务器请求数据，服务器返回数据后，客户端可以直接在URL中看到数据。GET方法的数据传输量比POST方法小，适用于获取不敏感数据的场景。总之，C语言开发者可以使用HTTP和HTTPS协议以及POST和GET方法进行网络通信，以方便地实现各种数据传输功能。

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c++ http https post get

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