Part of lib View Source
| Function | get_headers | Undocumented | 
| Function | is_html | Undocumented | 
| Function | download_headers_and_content_if_html | Undocumented | 
| Function | download_if_html | Undocumented | 
| Function | download | Uses twisted.web.client.getPage() to fetch a Page via HTTP | 
| Returns | A Defered which will call a Callback with the content as argument | |