Hi-nginx-based Web development (python)-Dynamic Routing and Request methods

The provided route adorner for hi.py accepts two parameters, the first parameter specifies the regular mode of dynamic routing, and the second parameter specifies a list of agreed HTTP request methods.

Like what:

 1  @app. Route (R " ^/client/?$   ", ["  get  , "  post   " ])  2  def       client (Req,res,param):  3  Res.content ( '  {}<br>{}<br>{}<br >{}<br>{}   " .format (Req.client ( ), Req.method (), Req.uri (), Req.user_agent (), Req.param ()))  4  res.status ( ) 

This route specifies that the URI is/client or/client/, while the request method is a GET or post HTTP request handled by the function client (Req,res,param). The URI pattern consists of a regular expression, the request method parameter is represented by a list, the acceptable method name includes: Get,post,put,head,patch, and so on, where nginx can understand the HTTP method name can be.

The processing function has three parameters, namely Req,res and Param. They are hi_req,hi_res and group dict that are derived from regular expressions. The first two are APIs provided by Hi-nginx that provide a range of ways to manipulate the HTTP protocol:

Hi_req

• Uri
• Method
• Client
• Param
• User_agent
• Has_header
• Get_header
• Has_form
• Get_form
• Has_session
• Get_session
• Has_cookie
• Get_cookie

Hi_res

• Status
• Content
• Header
• Session

The third parameter of the handler function param can be used to parse the data provided by the regular pattern, such as:

 1  @app. Route (R " ^/hello/(? p<who>\w+)? $  , ["  get   " ])  Span style= "COLOR: #008080" >2  def   Hello ( Req,res,param):  3  res.content ( " Span style= "COLOR: #800000" >{}={}   ". Format (  " who   ", Param["   Who   "   4  res.status ($) 

Regular mode ^/hello/(? p<who>\w+) $ is a pattern that the Python re module can understand, and when the URI is/hello/cnblogs, the parameter param is a dict dictionary containing the WHO key, with Cnblogs as its value. As a result, it can be used to provide data outside the form for the operation function and to beautify the URI. For example/hello?who=cnblogs is inferior to/hello/cnblogs beautiful concise.

In addition, the same operation function can correspond to multiple routing rules, such as:

1@app. Route (R'^/test/?$',['POST'])2@app. Route (R"^/$",['GET'])3 defHello_world (req,res,param):4Res.header ('Content-type','Text/plain;charset=utf-8')5Res.content ('Hello,world')6Res.status (200)

In the above code, the Operation function Hello_world can be called when the URI is/or/test or/test/, provided that one request method is get and the other is the Post method. This function, which corresponds to multiple routes, eliminates the hassle of writing the following code:

1 if req.method () = ='GET':2     ... 3 if req.method () = ='POST':4...     

Hi-nginx-based Web development (python)-Dynamic Routing and Request methods