# http请求如何以表单形式进行传输

1. 在HTTP协议消息头中，使用Content-Type来表示媒体类型信息，设置该参数值为"application/x-www-form-urlencoded"。

   ```
   import { http } from '@kit.NetworkKit';

   let options: http.HttpRequestOptions = {
     method: http.RequestMethod.GET,
     extraData: 'send message',
     header: { 'Content-Type': 'application/x-www-form-urlencoded' },
     readTimeout: 50000,
     connectTimeout: 50000
   }
   ```

2. extraData表示发送请求的数据，目前支持string、Object和ArrayBuffer三种类型。

   ```
   let httpRequest = http.createHttp();
   let data = "user=Query&password=Admin123";
   httpRequest.request(
     'https:xxx',
     {
       method: http.RequestMethod.POST,
       // Optional, default is http.RequestMethod.GET//Developers can add header fields according to their own business needs
       header: { 'Content-Type': 'application/x-www-form-urlencoded' }, // This field is used to pass content when using POST requests
       extraData: data,
       connectTimeout: 60000, // Optional, default is 60000ms
       readTimeout: 60000, // Optional, default is 60000ms
     }, (err, data) => {
     if (!err) {
       // Data.read is the HTTP response content, which can be parsed according to business needs
       console.info('Result:' + JSON.stringify(data.result));
       console.info('code:' +
       JSON.stringify(data.responseCode)); // Data.reader is an HTTP response header that can be parsed according to business needs
       console.info('header:' + JSON.stringify(data.header));
       console.info('cookies:' +
       JSON.stringify(data.cookies)); // Starting from API8
     } else {
       console.info('error:' + JSON.stringify(err)); // Unsubscribe from HTTP response header events
       httpRequest.off('headersReceive'); // When the request is exhausted, call the destroy method to actively destroy it.
       httpRequest.destroy();
     }
   })
   ```