自动请求

默认分类 2018/06/12 17:26

hui = {};
hui.xhr = function(opt) {
  opt = opt ? opt : {}
  var body = opt.body || JSON.stringify(opt.data) || ''
  var ctype = opt.contentType
  var xhr = new XMLHttpRequest() // XMLHttpRequest 对象
  var method = opt.type || (body ? 'POST' : 'GET')
  xhr.open(method, opt.url, true) // POST方式，url为请求地址，true该参数表示是否异步处理
  if (ctype === false || (body && window.FormData && ctype === undefined && body instanceof FormData)) {
    /* no need ContentType */
  } else {
    xhr.setRequestHeader('Content-Type', ctype || 'application/json')
  }
  xhr.onreadystatechange = function(xhr, opt) {
    if (xhr.readyState == 4 && xhr.status == 200) {
      if (opt.success && typeof opt.success == 'function') {
        window.setTimeout(function(xhr, opt) {
          opt.success(!opt.responseType || opt.responseType == 'json' ?
            Function('return ' + xhr.responseText)() : xhr.responseText)
        }.bind({}, xhr, opt), opt.delay || 1)
      }
    } else if (xhr.readyState == 4 && xhr.status != 200) {
      if (opt.error) opt.error(xhr.status)
    }
  }.bind({}, xhr, opt)
  xhr.send(body) // 开始上传，发送form数据
  return xhr
}

function spider1() {
  if (!window.stop1 && list.length) {
    var s1 = list.pop();
    hui.xhr({
      url: 'https://segmentfault.com' + s1 + '/info',
      responseType: 'text/html',
      success: function(res) {
        if (res.indexOf('人类身份验证') == -1) spider1()
      }
    })
  }
}

var list = []

>> 留言评论