iOS Development Network Chapter-get requests and POST requests

One,get request and POST request simple description

Create a GET request

1// 1. Set Request path 2 NSString * urlstr=[nsstring stringwithformat:@ "http:// 192.168.1.53:8080/mjserver/login?username=%@&pwd=%@ " ,self.username.text,self.pwd.text]; 3 nsurl *url=[nsurl Urlwithstring:urlstr];4 5 // 2. Create a Request object 6 nsurlrequest *request=[nsurlrequest requestwithurl:url]; 7 8 // 3. Send Request   

Server:

Create a POST request

1//1. Set the request path2 Nsurl *url=[nsurl urlwithstring:@"Http://192.168.1.53:8080/MJServer/login"];//No need to pass parameters34//2. Create a Request object5 nsmutableurlrequest *request=[nsmutableurlrequest Requestwithurl:url];//Default is GET request6 request.timeoutinterval=5.0;//Set request Timeout to 5 seconds7 request. Httpmethod=@"POST";// Set request method  8  9 // set request body 10 NSString * param=[nsstring stringwithformat:@ "username=%@& Pwd=%@ ",self.username.text,self.pwd.text];11 // Convert the stitched string to data, set the request body 12 request. Httpbody=[param datausingencoding:nsutf8stringencoding]; 14 // 3. Send Request   

Server:

Second, Comparison

Recommendation: submit a user's privacy data be sure to use the POST request

Relative to a POST request, all parameters of a GET request are exposed directly to the URL, and the requested URL is typically recorded in the server's access log, and the server's access log is one of the key objects of the hacker attack

User's privacy data such as login password, bank account and so on.

Third, the use

1. Tell the server through the request header, the type of client (can be modified to spoof the server)

1//1. Set the request path2 Nsurl *url=[nsurl urlwithstring:@"Http://192.168.1.53:8080/MJServer/login"];//No need to pass parameters34//2. Create a Request object5 nsmutableurlrequest *request=[nsmutableurlrequest Requestwithurl:url];//Default is GET request6 request.timeoutinterval=5.0;//Set request Timeout to 5 seconds7 request. Httpmethod=@"POST";//Set Request method89// set request body 10 NSString * param=[nsstring stringwithformat:@ "username=%@& Pwd=%@ ",self.username.text,self.pwd.text];11 // Convert the stitched string to data, set the request body 12 request. Httpbody=[param datausingencoding:nsutf8stringencoding]; 14 // client type, can only be written in English. Span style= "color: #008080;" >15 [request setvalue:@ "ios+android" forhttpheaderfield:@ "user-agent"];   

Server:

2. Strengthen the handling of Chinese

Problem: URL is not allowed to write Chinese

In a GET request, the relevant code snippet breaks to verify.

In the concatenation parameter of the string, the user name uses "top of text".

Converted to a URL, the whole becomes a null value.

Hint: The URL cannot contain Chinese.

Resolution: transcoding

1//1. Set the request path2 nsstring *urlstr=[nsstring stringwithformat:@ "http://192.168.1.53:8080/mjserver/login?username=%@&pwd=%@,self.username.text,self.pwd.text]; 3 // transcoding 4 urlstr= [Urlstr stringbyaddingpercentescapesusingencoding:nsutf8stringencoding]; 5 nsurl *url=[nsurl Urlwithstring:urlstr];6 7 // 2. Create a Request object 8 nsurlrequest *request=[nsurlrequest Requestwithurl:url];         

Debug View:

Server:

iOS Development Network Chapter-get requests and POST requests