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| import axios from 'axios';
interface Queue {
url: string;
method: string;
data: any;
resolve: Function;
reject: Function;
}
interface Header {
[key: string]: string;
}
class Request {
QUEUES: Queue[] = [];
CONCURRENCY_NUMBER: number;
TASKING_NUMBER: number = 0;
constructor(concurrencyNumber: number = 3, header: Header = {}) {
this.CONCURRENCY_NUMBER = concurrencyNumber;
this.HEADER = header;
}
setHeader(key: string = '', value: string = ''): void {
this.HEADER[key] = value;
}
push(url: string, method: string, data: any = null): Promise<any> {
return new Promise((resolve, reject): void => {
this.QUEUES.push({url, method, data, resolve, reject});
this.run();
})
}
private run(): void {
if (this.TASKING_NUMBER < this.CONCURRENCY_NUMBER) {
this.request();
}
}
private next(): void {
if (this.QUEUES.length > 0 && this.TASKING_NUMBER < this.CONCURRENCY_NUMBER) {
this.request();
}
}
private request() {
let task = this.QUEUES.shift();
this.TASKING_NUMBER++;
axios({
url: task!.url,
method: task!.method,
headers: this.HEADER,
data: task!.data,
withCredentials: true
}).then((response: any): void => {
task!.resolve(response);
}).catch((reason: any): void => {
task!.reject(reason);
}).finally((): void => {
this.TASKING_NUMBER--;
this.next();
});
}
}
|
