Use Fiddler to build a mobile phone debugging environment (the project I am working on is debugging WeChat official account)

Reference for part of the content: http://ju.outofmemory.cn/entry/22854

When we were testing the WeChat Enterprise Account, due to the limitations of WeChat, we couldn’t take it to the Chrome browser for debugging, so we couldn’t see the page changes in real time, so we needed someone who could check our page changes at any time. tool. Although there are some problems with using Fiddler, it still cannot be debugged directly in our browser, but it is much simpler than uploading the modified page to the server and then making a request using a mobile phone.

1. First we need to install a fiddler. It can be Chinese or not. I will provide you with a non-Chinese version. Link: http://pan.baidu.com/s/1miuGbyS Password: kjjg, just confirm and install. After the installation is complete, we make the following settings. The Fiddler proxy uses port 8888 by default. We set the http proxy on the mobile phone to be Fiddler's proxy server (there are specific steps below), so that all requests from mobile applications are forwarded through Fiddler, thereby realizing the function of viewing page requests on the mobile phone. .

1) Set Fiddler’s options.

                                                                               Open Fiddler->Tools->Fiddler Options and check Allow remote computers to connect in the Connection panel. After confirmation, close Fiddler and reopen Fiddler.

        2) At this time, in order to ensure that the agent is working normally, we can execute <span class="pln">netstat <span class="pun">-<span class="pln">anop tcp</span></span></span> in cmd to check whether the Fiddler process is listening to port 8888 normally. If the service is not started normally, you can try to use Other ports, the location of port modification (can be modified directly in the previous step).

Let’s first open the task manager to see what the PID code of our Fiddler is below. The shortcut key to open the Task Manager is Ctrl+shift+ESC. Under normal conditions, as shown in the figure, the PID of our Fiddler.exe is 3156. If there is no PID item in your interface, then look down.

On the task management page, select View--Select Column, and put a check mark in the PID column, as shown in the picture, so that the PID is available in the task management interface.

Open our cmd and execute the netstat -anop tcp command. As shown in the figure below, we can see that the PID is 3156 and is listening to port 8888. Then next we need to set the proxy on the mobile phone to Fiddler's proxy. The proxy setting requires an IP and a port. The IP is the LAN IP address of the computer where Fiddler is running (the computer where Fiddler is installed). The default port is the port 8888 of the Fiddler proxy. , please make sure that the network segment where the mobile phone is located can access the network segment where the computer is located. There is generally no problem in the same LAN (the computer uses broadband, the mobile phone uses wifi, one network is enough).

2. Check the ip of the computer where we installed the fiddler software. As shown in the picture, my computer ip is 192.168.1.12. Because I use the company's network, the ip is obtained dynamically every day, so if we don't To change the IP to a fixed one, you have to manually modify it every time you use fiddler.

3. Set up a proxy for our mobile phone and visit 192.168.1.12:8888. I use Samsung S7. Just press and hold directly on the linked wifi. The proxy host name is the IP of our computer network and the proxy server port. It’s the one our fiddler is monitoring, as shown in the picture

                                                                                            

4. Finally, we need to configure the hosts file of our computer. The path is as follows,

Write our computer IP, followed by the URL of the web page we want to debug.

This way we can debug our hand-extreme pages.

5. Problem: After we set up fiddler, when we visit the website with https protocol, the following problems may occur, as shown in the picture:

This problem causes us to be unable to access some website content normally, such as Baidu, Alibaba, etc. This is because our fiddler has turned on monitoring https. Just remove the check in the settings. On the fiddler page, click Tools--Telerik Fiddler Option--HTTPS and remove the checkmark that monitors the https channel (decrypt HTTPS traffic)