http请求头 Content-Type 详解（三）

摘要：用NodeJs request模块模拟第一篇用html请求的http请求

一、Content-Type: application/x-www-form-urlencoded

代码：

var request = require("request");
var url = "http://localhost/test/curl/service.php";
request.post({
url:url,
proxy:'http://localhost:8888'
}, function(err, response, body){
console.log(response.headers);
console.log(body);
}).form({
"name" : "zhangtao",
"address" : 123
});

或者这样写：

request.post({
url : url,
proxy:'http://localhost:8888',
form : {"name" : "zhangtao","address" : 123}
}, function(err, response, body){
console.log(body);
});

http请求：

POST http://localhost/test/curl/service.php HTTP/1.1
host: localhost
content-type: application/x-www-form-urlencoded
content-length: 54
Connection: close

name=zhangtao&address=123&encode=%E4%B8%AD%E6%96%87%26

注意请求体内容做了url_encode

二、content-type: multipart/form-data;

代码：

var request = require("request");
var url = "http://localhost/test/curl/service.php";
var formData = {
"name" : "lu",
"node_buffer" : new Buffer([1, 2, 3])
};
request.post({
url : url,
proxy : 'http://localhost:8888',
formData : formData
}, (err, response, body) => {
console.log(body);
});

http请求：

POST http://localhost/test/curl/service.php HTTP/1.1
host: localhost
content-type: multipart/form-data; boundary=--------------------------159485793623903092889117
content-length: 314
Connection: close

----------------------------159485793623903092889117
Content-Disposition: form-data; name="name"

lu
----------------------------159485793623903092889117
Content-Disposition: form-data; name="node_buffer"
Content-Type: application/octet-stream

----------------------------159485793623903092889117--
（注意上面node_buffer里面的值是二进制的，这里复制到这里不显示了）

post文件，代码：

var request = require("request");
var fs = require("fs");
var url = "http://localhost/test/curl/service.php";
var formData = {
"name" : "lu",
"node_buffer" : new Buffer([1, 2, 3]),
"node_file" : fs.createReadStream(__dirname + '/share-qq.png')
};
request.post({
url : url,
proxy : 'http://localhost:8888',
formData : formData
}, (err, response, body) => {
console.log(body);
});

http请求：

POST http://localhost/test/curl/service.php HTTP/1.1
host: localhost
content-type: multipart/form-data; boundary=--------------------------521008285990597015283124
content-length: 1598
Connection: close

----------------------------521008285990597015283124
Content-Disposition: form-data; name="name"

lu
----------------------------521008285990597015283124
Content-Disposition: form-data; name="node_buffer"
Content-Type: application/octet-stream

----------------------------521008285990597015283124
Content-Disposition: form-data; name="node_file"; filename="share-qq.png"
Content-Type: image/png

PNG

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----------------------------521008285990597015283124--

三、Content-Type: application/json;

代码：

var request = require("request");
var url = "http://localhost/test/curl/service.php";
var sendJson  ={
a : "a",
b : "b"
}
request({
url: url,
method: "POST",
proxy : 'http://localhost:8888',
json: true,
headers: {
"content-type": "application/json"
},
body: sendJson
}, function(error, response, body) {
console.log(body);
});

http请求：

POST http://localhost/test/curl/service.php HTTP/1.1
content-type: application/json
host: localhost
accept: application/json
content-length: 17
Connection: close

{"a":"a","b":"b"}