Question

我试图从horsemanjs运行示例代码稍加修改：

var Horseman = require('node-horseman');
var horseman = new Horseman();
horseman
    .userAgent('Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0')
    .open('http://www.google.com')
    .type('input[name="q"]', 'github')
    .click('[name="btnK"]')
    .keyboardEvent('keypress', 16777221)
    .waitForSelector('div.g')
    .plainText()
    .log()
    .close();

几天前它确实奏效了，但突然决定不这样做。我跑的时候会得到这个：

➜ Debug=horseman node test.js
   horseman using PhantomJS from phantomjs-prebuilt module +0ms
   horseman .setup() creating phantom instance 1 +3ms
   horseman phantom created +195ms
   horseman .close(). +13ms
Unhandled rejection Error
      at IncomingMessage.<anonymous(/home/halvor/BettingSource/node_modules/node-phantom-simple/node-phantom-simple.js:612:14)
      at IncomingMessage.emit (events.js:188:7)
      at endReadableNT (_stream_readable.js:974:12)
      at _combinedTickCallback (internal/process/next_tick.js:80:11)
      at process._tickCallback (internal/process/next_tick.js:104:9)

使用Bluebird调试：

➜  BettingSource DEBUG=horseman BLUEBIRD_DEBUG=1 node test.js                                                                             
    horseman using PhantomJS from phantomjs-prebuilt module +0ms
    horseman .setup() creating phantom instance 1 +3ms
    horseman phantom created +149ms
    horseman .close(). +16ms
Unhandled rejection HeadlessError: Error parsing JSON from phantom: SyntaxError: Unexpected end of JSON input
Data from phantom was:
    at IncomingMessage.<anonymous> (/home/halvor/BettingSource/node_modules/node-phantom-simple/node-phantom-simple.js:612:14)
    at emitNone (events.js:91:20)
    at IncomingMessage.emit (events.js:188:7)
    at endReadableNT (_stream_readable.js:974:12)
    at _combinedTickCallback (internal/process/next_tick.js:80:11)
    at process._tickCallback (internal/process/next_tick.js:104:9)
From previous event:
    at prepare (/home/halvor/BettingSource/node_modules/node-horseman/lib/index.js:54:9)
    at new Horseman (/home/halvor/BettingSource/node_modules/node-horseman/lib/index.js:155:15)
    at Object.<anonymous> (/home/halvor/BettingSource/test.js:2:16)
    at Module._compile (module.js:571:32)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:488:32)
    at tryModuleLoad (module.js:447:12)
    at Function.Module._load (module.js:439:3)
    at Module.runMain (module.js:605:10)
    at run (bootstrap_node.js:425:7)
    at startup (bootstrap_node.js:146:9)
    at bootstrap_node.js:540:3

Phantomjs从终端工作，我试图重新安装节点模块。我必须注意，对节点的经验很少。

注意：要安装phantomjs / horseman，我执行了以下操作：

从phantomjs网站下载tar.gz文件并将其解压缩，放入bath / home / bin
在/ home / halvor / BettingSource
Ran npm install phantomjs
Ran npm install node-horseman

我安装了phantomjs的两次都表示在路径中找不到phantomjs并再次下载它。

Answer 1

看起来错误来自同一目录中的.htpasswd文件。一旦我删除它一切正常

Answer 2

您需要处理承诺拒绝：

.catch(err => {
    // handle the error here
});

为您的程序中创建的每个承诺。否则它将兑现承诺链中的任何拒绝。

有关详细信息，请参阅此答案：

Should I refrain from handling Promise rejection asynchronously?

未处理的拒绝错误 - 骑士

2 个答案: