wxapp-http
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Http module for WeChat APP
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# wxapp-http
[](https://travis-ci.org/axetroy/wxapp-http)
[](https://david-dm.org/axetroy/wxapp-http)
[](https://github.com/prettier/prettier)
[](https://badge.fury.io/js/wxapp-http)
微信小程序的http模块，机智得“绕过”最大5个http并发的限制.
## Installation
```bash
npm install wxapp-http
```
[example](https://github.com/axetroy/wxapp-http/tree/master/example)
## Features
- [x] 更优雅的API
- [x] http请求的拦截器
- [x] http请求的事件监听器, 发布订阅者模式(基于[@axetroy/event-emitter.js](https://github.com/axetroy/event-emitter.js))
- [x] http请求返回promise
- [x] http请求队列化，规避小程序的并发限制
- [x] 自定义http请求的最高并发数量
## Usage
```javascript
// es6
import http from 'wxapp-http';
// commonJS
const http = require('wxapp-http').default;
http.get('https://www.google.com')
.then(function(response){
})
.catch(function(error){
console.error(error);
});
```
## API
### Response
Response返回的结构体
```typescript
interface Response${
data: any,
errMsg: string,
header: Object,
statusCode: number
}
```
#### http.request
```typescript
Http.prototype.request = function(method:string, url:string, body?:Object | string="", headers?: Object={}, dataType?: String="json"): Promise<Response$>{
}
```
#### http.get
```typescript
Http.prototype.get = function(url:string, body?:Object | string="", headers?: Object={}, dataType?: String="json"): Promise<Response$>{
}
```
#### http.post
```typescript
Http.prototype.post = function(url:string, body?:Object | string="", headers?: Object={}, dataType?: String="json"): Promise<Response$>{
}
```
...
#### 以及OPTIONS, HEAD, PUT, DELETE, TRACE, CONNECT 请求, 参数同上
### 拦截器
配置文件字段
```typescript
interface Config${
method: string,
url: string,
data: Object | string,
header: Object,
dataType: string
}
```
#### 请求拦截器
返回布尔值，如果为true，则允许发送请求，如果为false，则拒绝发送请求，并且返回的promise进入reject阶段
```typescript
Http.prototype.requestInterceptor = function(func:(config: Config$)=> boolean): void{
}
http.requestInterceptor(function(config){
// 只允许发送https请求
if(config.url.indexOf('https')===0){
return true;
}else{
return false;
}
});
```
#### 响应拦截器
返回布尔值，如果为true，则返回的promise进入resolve阶段，如果为false，则进入reject阶段
```typescript
Http.prototype.responseInterceptor = function(func:(config: Config$, response: Response$)=> boolean): void{
}
http.responseInterceptor(function(config, response){
// 如果服务器返回null，则进入reject
if(response && response.data!==null){
return true;
}else{
return false;
}
});
```
### 监听器
监听全局的http请求
```typescript
http.prototype.on = function(listener : (event:string, [...data])=> void){
}
// example
http.on('request', function(config){
});
http.on('success', function(config, response){
});
http.on('fail', function(config, response){
});
http.on('complete', function(config, response){
});
```
事件: [request, success, fail, complete]
参数: [config, response]
[查看更多事件API](https://github.com/axetroy/event-emitter.js)
### 事件触发顺序
```
requestInterceptor
↓
onRequest
↙ ↘
onSuccess onFail
↘ ↙
responseInterceptor
↓
onComplete
```
### 清除请求队列
适用于小程序页面切换后，取消掉未发出去的http请求.
```typescript
Http.prototype.clean = function() : void{
}
http.clean();
```
### 自定义最高并发数量
最高并发数量默认为5个
```javascript
import {Http} from 'wxapp-http';
const http = new Http(3); // 设置最高并发3个
http.get('https://www.google.com')
.then(function(response){
})
.catch(function(error){
console.error(error);
});
```
## Contributing
```bash
git clone https://github.com/axetroy/wxapp-http.git
cd ./wxapp-http
yarn
yarn run start
```
1. 打开微信web开发者工具， 加载wxapp-http/example目录
2. 修改index.js
You can flow [Contribute Guide](https://github.com/axetroy/wxapp-http/blob/master/contributing.md)
## Contributors
<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
| [<img src="https://avatars1.githubusercontent.com/u/9758711?v=3" width="100px;"/><br /><sub>Axetroy</sub>](http://axetroy.github.io)<br />[💻](https://github.com/gpmer/gpm.js/commits?author=axetroy) 🔌 [⚠️](https://github.com/gpmer/gpm.js/commits?author=axetroy) [🐛](https://github.com/gpmer/gpm.js/issues?q=author%3Aaxetroy) 🎨 |
| :---: |
<!-- ALL-CONTRIBUTORS-LIST:END -->
## License
The [MIT License](https://github.com/axetroy/wxapp-http/blob/master/LICENSE)