login with python requests
requests library is a powerful python package for http. You can use it to fetch web pages, and do anything as the http verbs can do. To use requests, install […]
python import syntax
import can be used independently: import module import package It can be used to import a module, a package, or . concated module/packages. import package.module import package1.package2 import package1.package2.module But […]
JSON in javascript, python, and php
I often got confused about JSON and JSON string. JSON is the code you write in your javascript script to represent an object, so the code is called JavaScript Object […]
How to uncompress gzip-encoded content in php?
If you use php curl to scrape web page, the retrieved content may be in compressed format,i.e., the Content-Encoding http response header may have the value “gzip”. How to uncompress […]
default http headers generated by php curl
We know that we can customize http headers for php curl using CURLOPT_HTTPHEADER. But if we do not add additional headers, what http headers does curl send by default? In […]
How to log curl request?
I encountered a strange problem of php curl. I use curl to fetch a remote web page as follows: $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, “https://myprogrammingnotes.com”); curl_setopt($curl, CURLOPT_HEADER,1); curl_setopt($curl, CURLOPT_FRESH_CONNECT,1); curl_setopt($curl, […]
Does php curl issue an http GET request or an POST request?
php curl is often used to fetch remote content. Sure you can use file_get_content to fetch remote web pages. But curl has more options to choose. We know that http […]
How to display errors on php web pages?
To debug .php web pages, you want to print something on the browser’s windows when opening the web pages. You can use the php echo or print function to display […]
How to protect web page from being copied using javascript?
Some stupid websites may use javascript to disable copy/paste. You can not select the text on their website. You can not use Ctrl C to copy content from the webpage. […]
The first parameter of setTimeout in javascript
I often got confused by different usages of the setTimeout function. I do not know where I got the following usage, which is proven not the correct usage: setTimeout(“alert(‘hello world’)”,1000); […]