Pyspider上手

pyspider安装： pip3 install Pyspider

启动服务操作

1、打开cmd:输入        pyspider  --help 回车，可以查看帮助信息，pyspider all 启动command服务

2、启动后看到0.0.0.0.5000 提示就启动好了，打开浏览器127.0.0.1：5000或者http://localhost:5000/ 打开pyspider的web UI界面，

3、首先点击creat创建项目，名字任意

4、右边web页面代码如下：

#!/usr/bin/env python

# -*- encoding: utf-8 -*-
# Created on 2018-08-22 23:16:23
# Project: TripAdvisor

from pyspider.libs.base_handler import *

class Handler(BaseHandler):
crawl_config = {
}

@every(minutes=24 * 60)
def on_start(self):
self.crawl('__START_URL__', callback=self.index_page)

@config(age=10 * 24 * 60 * 60)
def index_page(self, response):
for each in response.doc('a[href^="http"]').items():
self.crawl(each.attr.href, callback=self.detail_page)

@config(priority=2)
def detail_page(self, response):
return {
"url": response.url,
"title": response.doc('title').text(),
}

把__START_URL__替换成要爬取的网站地址，进行save，点击左边的run按钮，点击左边窗体的follow点击《、》箭头

第一次尝试pyspider，出师未捷身先死，，，599了，立马百度下PySpider HTTP 599: SSL certificate problem错误的解决方法，发现有同病相怜的小伙伴，学习下经验https://blog.csdn.net/asmcvc/article/details/51016485

报错完整的代码（每个人安装的python路径不一样地址会有差异）

[E 180822 23:51:45 base_handler:203] HTTP 599: SSL certificate problem: self signed certificate in certificate chain
    Traceback (most recent call last):
      File "e:\programs\python\python36\lib\site-packages\pyspider\libs\base_handler.py", line 196, in run_task
        result = self._run_task(task, response)
      File "e:\programs\python\python36\lib\site-packages\pyspider\libs\base_handler.py", line 175, in _run_task
        response.raise_for_status()
      File "e:\programs\python\python36\lib\site-packages\pyspider\libs\response.py", line 172, in raise_for_status
        six.reraise(Exception, Exception(self.error), Traceback.from_string(self.traceback).as_traceback())
      File "e:\programs\python\python36\lib\site-packages\six.py", line 692, in reraise
        raise value.with_traceback(tb)
      File "e:\programs\python\python36\lib\site-packages\pyspider\fetcher\tornado_fetcher.py", line 378, in http_fetch
        response = yield gen.maybe_future(self.http_client.fetch(request))
      File "e:\programs\python\python36\lib\site-packages\tornado\httpclient.py", line 102, in fetch
        self._async_client.fetch, request, **kwargs))
      File "e:\programs\python\python36\lib\site-packages\tornado\ioloop.py", line 458, in run_sync
        return future_cell[0].result()
      File "e:\programs\python\python36\lib\site-packages\tornado\concurrent.py", line 238, in result
        raise_exc_info(self._exc_info)
      File "<string>", line 4, in raise_exc_info
    Exception: HTTP 599: SSL certificate problem: self signed certificate in certificate chain

错误原因：

这个错误会发生在请求 https 开头的网址，SSL 验证错误，证书有误。

解决方法：

使用 self.crawl(url, callback=self.index_page, validate_cert=False)                ------------------------------validate_cert=False要放在每个提取页里面不然打开子页面还是会599，吐血

代码如下：

 #!/usr/bin/env python
 # -*- encoding: utf-8 -*-
 # Created on 2018-08-23 23:06:13
 # Project: v2ex

 from pyspider.libs.base_handler import *

 class Handler(BaseHandler):
     crawl_config = {
     }

     @every(minutes=24 * 60)
     def on_start(self):
         self.crawl('https://www.v2ex.com/?tab=tech', callback=self.index_page,validate_cert=False)

     @config(age=10 * 24 * 60 * 60)
     def index_page(self, response):
         for each in response.doc('a[href^="https://www.v2ex.com/?tab="]').items():
             self.crawl(each.attr.href, callback=self.tab_page, validate_cert=False)

     @config(priority=2)
     def tab_page(self, response):
         for each in response.doc('a[href^="https://www.v2ex.com/go/"]').items():
             self.crawl(each.attr.href, callback=self.board_page, validate_cert=False)

     @config(priority=2)
     def board_page(self, response):
         for each in response.doc('a[href^="https://www.v2ex.com/t/"]').items():
             url = each.attr.href
             if url.find('#reply') > 0:
                 url = url[0:url.find('#')]
             self.crawl(url, callback=self.detail_page, validate_cert=False)        

     @config(priority=2)
     def detail_page(self, response):
         title = response.doc('h1').text()
         content = response.doc('div.topic_content')
         return {
             "url": response.url,
             "title": response.doc('title').text(),
         }

这个方法基本可以解决问题了（浏览器要手动刷新下，用360安全浏览器貌似有这个小问题，可能是我设置的问题，果断换chrome和火狐试了下，没发现这个情况。。。）

For Linux and MAC systems, please refer to the following links：

https://blog.csdn.net/WebStudy8/article/details/51610953