Request API

basic

Request used in send request to other domain.
https://blog.csdn.net/wuqingdeqing/article/details/99061026
https://blog.csdn.net/miss1128726/article/details/49976855
a basic sample of request:

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var options = {
  uri: 'http://api.example.fr/example/1.xml',
  auth: {
    user: 'test',
    pass: 'test',
    sendImmediately: false
  }
};
request(options, function(error, response, body){
    if (!error && response.statusCode == 200){
        console.log('body : ' + body)
    }
    else{
        console.log('Code : ' + response.statusCode)
        console.log('error : ' + error)
        console.log('body : ' + body)
    }
});

This method has limitation for case that expecting to send datas to more than one server. Like, I want to send xml sais to multiple bdc servers, it turns out to only transfer datas to the last bdc. (using request(options, responseHandler)

---

A better way to resolve this problem is utilizing request-promise.
see official API description.
Here is my implementation:

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const rp = require('request-promise');
module.exports = class sample {
  static async sampleFunc(para1, para2, para3) {
    var opts = {
      url: url,
      method: 'GET',
      auth:{
          user: username,
          pass: password,
          sendImmediately: false
      }
    };
    if(url.toLowerCase().startsWith('https')){
        opts.ca = cert;
        opts = Object.assign(Config.defaultOptions,opts); // sample
    }
    const responseHandler = (err, res, data) => {
      // sample
    }
    await rp(opts).then(responseHandler).catch((err) => {
      // print error in log
    });
  }
}

0717 UPDATE

ERROR implement request-promise above, note that it returns different paras from original request
Point:

  • resolveWithFullResponse: true,
  • then(reponse)
    Corrected:
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    static async sampleFunc(para1, para2, para3) {
        var opts = {
          url: url,
          method: 'GET',
          resolveWithFullResponse: true,
          auth:{
              user: username,
              pass: password,
              sendImmediately: false
          }
        };
    ...
      const responseHandler = (res) => {
        // the res is a full response containing res.statusCode & res.body
        // sample
      }
      await rp(opts).then(responseHandler).catch((err) => {
        // print error in log
      });
    }