这里可以使用两个基本选项：

• 模仿 onclick（）调用中涉及的逻辑 - 在您的情况下，使 dataform 使用 请求 或 mechanize



• 高级方法 - 自动化一个真正的浏览器，无头（ PhantomJS ）或不使用 selenium - 找到链接并点击它：

   来自selenium import webdriver 
  
   driver = webdriver.PhantomJS（）
   driver.get（'url here'）
  
   driver.find_element_by_class_name（'download-data-link1'）。click（）
   

尽管如此我明白，点击链接会触发一个下载浏览器对话框 - 然后 PhantomJS 不是一个选项，因为它不支持下载。对于 Chrome 或 Firefox ，您需要调整浏览器功能以自动下载文件而不打开弹出窗口，请参阅：

• 在Firefox中访问文件下载对话框


• Firefox + Selenium WebDriver并自动下载csv文件

There is a webpage which have a link "Click to Download" Clicking which a file is downloaded . I can download this file manually by going to webpage and clicking on this link however I need to download this file via a python script .

If i see the source i can see the anchor tag is will run a js function

<a class="download-data-link1" onclick=" document.forms['dataform'].submit()" style="cursor:pointer; vertical-align: middle;">Download in csv</a>

But i dont know the url of csv file and i am looking for a way to download it via python .

I know we can download a file if we have url using httplib but couldnt understand how to get a file without url .

Tried few things like in header added 'Content-Disposition': 'attachment;filename="data.csv"'}

but it dosent seems to work . Any ideas ?

Two basic options can be applied here:

• mimic the logic involved in the onclick() call - in your case, make the dataform form submission using requests, or mechanize

• high-level approach - automate a real browser, headless (PhantomJS) or not, using selenium - find the link and click it:

  from selenium import webdriver
  
  driver = webdriver.PhantomJS()
  driver.get('url here')
  
  driver.find_element_by_class_name('download-data-link1').click()
  

Though, as far as I understand, clicking the link would trigger a "Download" browser dialog to appear - then PhantomJS is not an option since it doesn't support downloads. In case of Chrome or Firefox you would need to tweak browser capabilities to automatically download files without opening the popup, see:

• Access to file download dialog in Firefox
• Firefox + Selenium WebDriver and download a csv file automatically