Superagent (Ajax API) that can be used for Nodejs

Simple example:

Import request from ' superagent '; // citation Declarations Request.post (API)    . Withcredentials ()// cross-domain    . End (Err, res) = {         if (Res.ok) {            = json.parse (res.text);         Else {            console.log (' get failed ');        }    });

1. Get mode

When using get a request to pass a query string, using the .query() method, passing an object, the following code will produce a /search?query=Manny&range=1..5&order=desc request:

request   . Get ('/search ')   ' Manny ' )   ' (1..5 ' }   ) ' desc ' }   . End (function(res) {   });

or pass a single Large object:

request  . Get ('/search ')  ' Manny ', Range: ' 1..5 ', Order: ' desc ' }  . End (  function(res) {  });

　　.query()Method also allows strings to be passed:

request    . Get ('/querystring ')    . Query (' search=manny&range=1..5 ')    . End (  function(res) {    });

or string concatenation:

request    . Get ('/querystring ')    . Query (' Search=manny ')    . Query (' Range=1..5 ')    . End (function(res) {    });

2. Post request

A typical JSON POST request looks like this, setting an appropriate Content-type header field and then writing some data, in this case just a JSON string:

Request.post ('/user ')    . Set (' Content-type ', ' Application/json ')    . Send (' {"name": "TJ", " Pet ":" Tobi "}")    . End (callback)

Because JSON is very generic, as the default Content-type , the following example is the same as above:

Request.post ('/user ')    ' TJ ', pet: ' Tobi ' })    . End (callback)

or call multiple .send() methods:

Request.post ('/user ')    ' TJ '    }) ' Tobi ')    . End (callback)

The default send string, set Content-type to application/x-www-form-urlencoded , multiple calls will be & connected by, here The result is name=tj&pet=tobi :

Request.post ('/user ').    Send (' NAME=TJ ').    Send(' Pet=tobi ')    . End (callback);

Superagent request data format can be extended, but the default support form and json two formats, want to send data to the type, you application/x-www-form-urlencoded can simply call the method to .type() pass the form parameters on the line, here by default json , The following request will post the name=tj&pet=tobi content:

Request.post ('/user ')    . Type (' form ')        ' TJ '} ') ' Tobi ' }    . End (callback)

3. Set Content-type

The common scenario is to use the .set() method:

Request.post ('/user ')   . Set (' Content-type ', ' Application/json ')

An easy way to do this is to call the .type() method, passing in a canonical MIME name, including type/subtype , or a simple suffix like xml , json so, png for example:

Request.post ('/user ')   . Type (' Application/json ') request.post ('/user ')   . Type ( ' json ')request.post ('/user ')   . Type (' png ')

4. Set the acceptance type

As with the .type() simple method, it is also possible .accept() to invoke a method to set the accepted type, which will be request.types referenced to support the passing of a canonical MIME name, including type/subtype , or a simple suffix, like xml json , pngThis, for example:

Request.get ('/user ')   . Accept (' Application/json ') request.get ('/user ')   . Accept ( ' json ')request.get ('/user ')   . Accept (' PNG ')

5. Cross-domain

　　.withCredentials()Method can activate the ability to send the original cookie, but only if Access-Control-Allow-Origin it is not a wildcard character (*) and Access-Control-Allow-Credentials is ' true '.

request  . Get (' http://localhost:4001/')  . Withcredentials ()  . End (  function(res) {    assert (= = res.status);    Assert (' tobi ' = = res.text);    Next ();  })

Superagent (Ajax API) that can be used for Nodejs