Method post

Env.js:468–569

(request, callback = () => {})

    }

    post(request, callback = () => {}) {
      const method = request.method
        ? request.method.toLocaleLowerCase()
        : 'post'

      // 如果指定了请求体, 但没指定 `Content-Type`、`content-type`, 则自动生成。
      if (
        request.body &&
        request.headers &&
        !request.headers['Content-Type'] &&
        !request.headers['content-type']
      ) {
        // HTTP/1、HTTP/2 都支持小写 headers
        request.headers['content-type'] = 'application/x-www-form-urlencoded'
      }
      // 为避免指定错误 `content-length` 这里删除该属性，由工具端 (HttpClient) 负责重新计算并赋值
      if (request.headers) {
        delete request.headers['Content-Length']
        delete request.headers['content-length']
      }
      // followRedirect 禁止重定向
      if (
        typeof request.followRedirect !== 'undefined' &&
        !request['followRedirect']
      ) {
        if (this.isSurge() || this.isLoon()) request['auto-redirect'] = false // Surge & Loon
        if (this.isQuanX())
          request.opts
            ? (request['opts']['redirection'] = false)
            : (request.opts = { redirection: false }) // Quantumult X
      }
      switch (this.getEnv()) {
        case 'Surge':
        case 'Loon':
        case 'Stash':
        case 'Shadowrocket':
        case 'Egern':
        default:
          if (this.isSurge() && this.isNeedRewrite) {
            request.headers = request.headers || {}
            Object.assign(request.headers, { 'X-Surge-Skip-Scripting': false })
          }
          $httpClient[method](request, (err, resp, body) => {
            if (!err && resp) {
              resp.body = body
              resp.statusCode = resp.status ? resp.status : resp.statusCode
              resp.status = resp.statusCode
            }
            callback(err, resp, body)
          })
          break
        case 'Quantumult X':
          request.method = method
          if (this.isNeedRewrite) {
            request.opts = request.opts || {}
            Object.assign(request.opts, { hints: false })
          }
          $task.fetch(request).then(