A font created by the developer , But it is precisely because it was created by itself , So when we check the source code of the web page, we find that it is garbled , Because our system doesn't recognize .
But because it is a front-end display , If you recreate all the thousands of common Chinese characters , So every time you visit the website, you need to download more than ten megabytes of content , So it's often just numbers , Or some sensitive words are remade .
When we crawl too many websites , Will you find a situation , That is to say, Mingming sees the actual data on the web page , But when you use python After the reptile crawled down , The data becomes garbled , Can't identify what it is .
For example, we see that the data of the web page is ： Price ：100/ element
But when we use python The crawler technology obtains the html After code , The data that can be seen can not be seen , It's garbled , And we use all common encoding formats , Can't recognize , This is a font created by the developer of this website for data confidentiality .
Our computer does not store this font library , All unrecognized garbled codes , So if we need to convert the garbled code into plaintext , We first need to understand how to create fonts . What kind of method is this .
Here we use a software , The name is called FontCreator, This software can create Fonts , You can also parse fonts , Because we mainly analyze , So let's demonstrate parsing ;
Software package acquisition method ：
WeChat official account “ Operation and maintenance home ” The background to reply ：FontCreator
You can get the download address of the software ;
Then we install it step by step , Open the interface as follows ：
Here we choose a font that comes with the system , Let's see what it looks like after opening it .
First we need to know which font library we want to parse , Here we choose C:\Windows\Fonts Any file in this directory , Because all the fonts of our own computers are stored here , Select one to copy to another location ;
Click on FontCreator In the top right corner of the File–Open, Open the font library we just copied , The interface is as follows ：
We can see about this font library , Information about each font .
If we want to create a font , The simplest way is to transform what already exists , Double click to change the font , A similar interface appears ：
Debug the anchor point , After saving again , This font is unique to you .
After we pass the above cognition , We know that the font is a font created by the developer of the corresponding website for safety , So how can we solve this problem .
Here we come to understand four concepts ;
That is, a value of the Chinese character or the number itself ;
That is to say, what does this Chinese character look like , It can be simply understood as a painting ;
What is the name of this Chinese character in the corresponding font library ;
The name of this Chinese character , What is the corresponding code ;
What we see on the browser page , What is shown is The font itself , When viewing the source code , According to the **code*;
There are two ways ：
First of all ： Directly generate a new font library , The four elements are stable , It won't change ;
second ： Each request generates a new font library randomly ;
The first method is relatively simple , Directly parse the value and store it ;
The second method is more complicated , But speaking of complexity , It's not very complicated , Because of the four elements , The font itself 、 form 、name, These three elements generally do not change , What has changed is only what we see code, So can we deduce from it ？
This article is only theoretical knowledge , In the next article, let's practice hand in hand .
Support , In this paper, the end , Relevant contents are updated daily .
For more information, go to VX official account “ Operation and maintenance home ” , Get the latest article .
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