如何修复HTTP错误提取URL。在抓取时java中的状态= 500？ [英] how to fix HTTP error fetching URL. Status=500 in java while crawling?

问题描述

我正在尝试从评论页面抓取用户对imdb影院电影的评分：
（我的数据库中的电影数量约为600,000）。我使用jsoup解析页面如下:(对不起，我没有在这里写完整个代码，因为它太长了）

I am trying to crawl the user's ratings of cinema movies of imdb from the review page: (number of movies in my database is about 600,000). I used jsoup to parse pages as below: (sorry, I didn't write the whole code here since it is too long)

try {
  //connecting to mysql db
  ResultSet res = st
        .executeQuery("SELECT id, title, production_year " +
                "FROM title " +
                "WHERE kind_id =1 " +
                "LIMIT 0 , 100000");
  while (res.next()){
       .......
       .......
     String baseUrl = "http://www.imdb.com/search/title?release_date=" +
            ""+year+","+year+"&title="+movieName+"" +
            "&title_type=feature,short,documentary,unknown";
    Document doc = Jsoup.connect(baseUrl)
            .userAgent("Mozilla")
            .timeout(0).get();
      .....
      ..... 
//insert ratings into database
      ...

我测试了它的前100个，然后是前500个，还有我的数据库中的前2000个电影，它运行良好。但问题是，当我测试了100,000部电影时，我收到了这个错误：

I tested it for the first 100, then first 500 and also for the first 2000 movies in my db and it worked well. But the problem is that when I tested for 100,000 movies I got this error:

org.jsoup.HttpStatusException: HTTP error fetching URL. Status=500,   URL=http://www.imdb.com/search/title?release_date=1899,1899&title='Columbia'%20Close%20to%20the%20Wind&title_type=feature,short,documentary,unknown
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:449)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:424)
at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:178)
at org.jsoup.helper.HttpConnection.get(HttpConnection.java:167)
at imdb.main(imdb.java:47)

我搜索了很多这个错误，我发现它是服务器端错误，5xx错误数字。

I searched a lot for this error and I found it is a server side error with 5xx error number.

然后我决定设置一个条件，当连接失败时，它再尝试2次然后如果仍然无法连接，则不会停止并转到下一个网址。因为我是java新手，所以我试图搜索类似的问题并在stackoverflow中阅读这些答案：

Then I decided to set a condition that when connection fails, it tries 2 more times and then if still couldn't connect, does not stop and goes to the next url. since I am new to java I tried to search for similar questions and read these answers in stackoverflow:

我从网站提取数据时的例外情况

无法连接到网站时的Jsoup错误处理

处理连接错误和JSoup

但是，当我按照他们的建议尝试使用Connection.Response时，它告诉我Connection.Response无法解析为某种类型。

but, when I try with "Connection.Response" as they suggest, it tells me that "Connection.Response cannot be resolved to a type".

我很感激有人可以帮助我，因为我只是一个新手，我知道这可能很简单，但我不知道如何解决它。

I appreciate if someone could help me, since I am just a newbie and I know it might be simple but I don't know how to fix it.

好吧，我可以修复http错误状态500只需添加ignoreHttpError（true），如下所示：

Well, I could fix the http error status 500 by just adding "ignoreHttpError(true)" as below:

org.jsoup.Connection con = Jsoup.connect(baseUrl).userAgent("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.21 (KHTML, like Gecko) Chrome/19.0.1042.0 Safari/535.21");
con.timeout(180000).ignoreHttpErrors(true).followRedirects(true);
Response resp = con.execute();
Document doc = null;

if (resp.statusCode() == 200) {
    doc = con.get();
......

希望它能帮助那些有同样错误的人。

hope it can help those have the same error.

然而，在抓取22907部电影（约12小时）的评论页面后，我又出现了另一个错误：

READ TIMED OUT。

however, after crawling review pages of 22907 movies (about 12 hours), I got another error:
"READ TIMED OUT".

我感谢任何修复此错误的建议。

I appreciate any suggestion to fix this error.

推荐答案

将我的评论升级为答案：

Upgrading my comments to an answer:

Connection.Response 是 org.jsoup.Connection.Response

只有在有效的http代码（200）允许文档实例时，才能中断通话分为3部分; 连接，回复，文件

To allow document instance only when there is a valid http code (200), break your call into 3 parts; Connection, Response, Document

他nce，您上面代码的一部分被修改为：

Hence, your part of the code above gets modified to:

while (res.next()){
       .......
       .......
       String baseUrl = "http://www.imdb.com/search/title?release_date=" + ""
                + year + "," + year + "&title=" + movieName + ""
                + "&title_type=feature,short,documentary,unknown";
       Connection con = Jsoup.connect(baseUrl).userAgent("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.21 (KHTML, like Gecko) Chrome/19.0.1042.0 Safari/535.21").timeout(10000);
       Connection.Response resp = con.execute();
       Document doc = null;
        if (resp.statusCode() == 200) {
            doc = con.get();
                    ....
        }

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