Django get Request Parameters

1. Get the parameters in the URL path

Requirement: assume that the user accesses 127.0.0.1/user/1/2. What should I do?

(1) unnamed parameters (location parameters)

# URLs in the project. add settings under py: URL (R' ^ user/(\ D +) $ ', views. index) # in user. in the index view of views: def index (request, a, B): # Return httpresponse ("Get Data % S % s" % (, B ))

 

(2) name parameters (keyword parameters)

# Add the URL (R' ^ user /(? P <Category> \ D + )/(? P <ID> \ D +) $ ', views. index) # in user. in the index view of views: def index (request, ID, category): # accepted parameters do not need to return httpresponse ("Get Data % S % s" % (category, ID ))

 

The output result is 1 2.

 

2. Obtain the query string

Requirement: Get 127.0.0.1: 8000/user? Id = 1 & pid = 99 query string value

# URLs in the project. add settings under py: URL (R' ^ user/$ ', views. index) # in user. in the index view of views, Def index (request): Id = request. get. get ("ID") pid = request. get. get ("PID") return httpresponse ("Get Data % S % s" % (ID, pid ))

Note: obtaining a query string has nothing to do with the request method: whether it isGETOrPOSTAll requests can be passed throughrequest.GETProperties to obtain !!!

 

3. Get form data

Use postman to send a form request.

Def index (request): Id = request. post. get ("ID") pid = request. post. get ("PID") return httpresponse ("Get Data % S % s" % (ID, pid ))

Note:request.POSTIt can only be used to obtain the Request body form data in post mode!

 

4. Obtain non-form types

• request.bodyAttribute: Get non-Form Type Request body data, such as JSON and XML. The retrieved data type isbytesType
• After obtaining the data, parse the data and retrieve the parameters.

Def index (request): json_str = request. Body json_str = json_str.decode ()# Python3.6 and above do not use this codeDict_data = JSON. Loads (json_str)# Loads converts STR to dict and dumps converts dict to StrId = dict_data.get ("ID") pid = dict_data.get ("PID") return httpresponse ("Get Data % S % s" % (ID, pid ))

 

5. Get the content of the Request Header

Common request headers are as follows:

• CONTENT_LENGTH-The length of the Request body (as a string ).
• CONTENT_TYPE-The MIME type of the Request body.
• HTTP_ACCEPT-Acceptable content types for the response.
• HTTP_ACCEPT_ENCODING-Acceptable encodings for the response.
• HTTP_ACCEPT_LANGUAGE-Acceptable versions for the response.
• HTTP_HOST-The HTTP Host header sent by the client.
• HTTP_REFERER-The referring page, if any.
• HTTP_USER_AGENT-The client's User-Agent string.
• QUERY_STRING-The query string, as a single (unparsed) string.
• REMOTE_ADDR-The IP address of the client.
• REMOTE_HOST-The hostname of the client.
• REMOTE_USER-The User Authenticated by the Web server, if any.
• REQUEST_METHOD-A string such"GET"Or"POST".
• SERVER_NAME-The hostname of the server.
• SERVER_PORT-The port of the server (as a string ).

Get the metadata of the Request Header

Example:

Def index (request): IP = request. Meta. Get ("remote_addr") return httpresponse ("your IP address is % s" % IP)

6. Get the content of the custom request header

Use postman to add a custom request header, key = ID, value = 1. So how should we get it?

The Code is as follows:

Def index (request): Id = request. Meta. Get ("http_id") return httpresponse ("your ID: % s" % ID)

Note: you must add a prefix when getting the custom request header attribute value.HTTP_And converts it to uppercase to obtain the value as a key.

 

Appendix (methods for obtaining Request Parameters ):

Attribute	Description
Path	The full path of the Request page, excluding the domain name port parameters. For example:/users/index
Method	A fully capitalized string that indicates the HTTP Method Used in the request. common values:GET,POST,DELETE,PUT. The following three types are:GETRequest: Form form is submitted by default (or the method is specified as get) Enter the address in the browser for Direct Request Hyperlink (a tag) in the webpage)
User	Logged On: abstractuser object; Not logged on: anonymoususer object; Determine if you have logged on:request.user.is_authenticated(), Returns true, indicating that you have logged on
Get	Dictionary-likeQueryDictObject, including all query string parameters in the URL
Post	Dictionary-likeQueryDictObject, includingPOSTAll key-Value Pair parameters requested (form data)
Body	Obtain the original request body data. The obtained data isBytes type
Files	A dictionary-like object that contains all uploaded files
Meta	pythonDictionary type, which encapsulates the data in the Request Header headers. -REMOTE_ADDR-Client IP Address -REQUEST_METHOD-A string, such as "get" or "Post -CONTENT_TYPE-MIME type of the Request body Note:For the key values added to the Request Header, Django adds the key prefixHTTP_Convert to uppercase and save the key value to request. Meta.
Cookies	A standardpythonDictionary, including allcookies, Keys and values are both strings
Session	Readable and writable dictionary-like objects:django.contrib.sessions.backends.db.SessionStore. DjangoProvidedsessionModule, which is enabled by default for savingsessionData

Django get Request Parameters