Question

我使用casperjs发布到网址并使用fiddler2调试我的代码。下面是我的代码（用coffeescript编写）。

casper = require('casper').create({
    waitTimeout    : 10000,
    verbose        : true,
    logLevel       : 'debug',
    userAgent      : 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36',
    ignoreSslErrors: true,
    viewportSize   : {
        width : 1080,
        height: 1024
    }

})

url = "http://www.sample.com/test"
casper.start()
casper.thenOpen(url, {
        method: "post",
        data  : {
            a     : "aaa",
            b     : "bbb",
            c     : "ccc"
        },
        headers: {
            "User-Agent"  : "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36777",
            "Content-Type": "application/x-www-form-urlencoded",
            "Accept": "text/plain, */*"
        }
    },
    ->
        console.log this.getPageContent()
)

casper.run()

当我运行它时，我得到了以下调试信息：

C:\casperjs\batchbin\cj.bat C:\Users\***\WebstormProjects\haha\test.coffee
[info] [phantom] Starting...
[info] [phantom] Running suite: 2 steps
[debug] [phantom] opening url: http://www.sample.com/test, HTTP POST
[debug] [phantom] Navigation requested: url=http://www.sample.com/test, type=Other, willNavigate=true, isMainFrame=true
[debug] [phantom] url changed to "http://www.sample.com/test"
[debug] [phantom] Successfully injected Casper client-side utilities
[info] [phantom] Step anonymous 2/2 http://www.sample.com/test (HTTP 200)
<html xmlns="http://www.w3.org/1999/xhtml"><body><parsererror style="display: block; white-space: pre; border: 2px solid #c77; padding: 0 1em 0 1em; margin: 1em; background-color: #fdd; color: black"><h3>This page contains the following errors:</h3><div style="font-family:monospace;font-size:12px">error on line 1 at column 1: Start tag expected.</div><h3>Below is a rendering of the page up to the first error.</h3></parsererror></body></html>
[info] [phantom] Step anonymous 2/2: done in 657ms.
[info] [phantom] Done 2 steps in 675ms

Process finished with exit code 0

然而，来自fiddler，我的帖子请求是：

POST http://www.sample.com/test HTTP/1.1
Origin: null
Content-Length: ***
Accept: text/plain, */*
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36777
Cookie: ***
Connection: Keep-Alive
Accept-Encoding: gzip
Accept-Language: en-US,*
Host: www.sample.com

a=aaa&b=bbb&c=ccc

我的帖子回复是：

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/xml; charset=utf-8
Vary: Accept-Encoding
Date: Mon, 08 Dec 2014 14:36:34 GMT
Content-Length: ***

http://www.sample.com/this_is_a_sample_url

请注意，网址 http://www.sample.com/this_is_a_sample_url 中的响应正文。但getPageContent()给了我一段HTML代码。起初我认为问题可能是由Accept请求标头引起的。但是，它已经设置为text/plain而不是HTML。谁能给我一些建议？

Answer 1

您的服务器响应可能包含正确的数据，但由于它将URL作为XML返回，因此PhantomJS无法正确解析此问题。这就是为什么错误显示为HTML页面。

您应该专门使用__utils__.sendAJAX下载内容（使用JavaScript）：

casper.post = function(url, data){
    return this.evaluate(function(targetURL){
        return __utils__.sendAJAX(targetURL, "POST", data, false, {
            overrideMimeType: "text/plain"
        });
    }, url);
};

casper.start("http://example.com").then(function(){
    var content = this.post(targetURL, {
        a     : "aaa",
        b     : "bbb",
        c     : "ccc"
    });
    // do something with content
}).run();

在开始时，打开一个虚拟（现有）页面以正确初始化系统。当虚拟域与实际请求域不同时，您还需要使用--web-security=false命令行选项运行CasperJS。

如果在start上使用虚拟本地html文件，则应添加--local-to-remote-url-access=true命令行选项，因为当前URL大约为：空白且AJAX请求仅限于当前域。 / p>

HTTP POST请求显示HTML错误，而不是显示请求正文

1 个答案: