如何创建到Web服务器的Http Post数据? [英] How to create Http Post data to the web server?
问题描述
如何创建到Web服务器的Http Post数据?
How to create Http Post data to the web server ?
您是否有与此问题相关的示例?
Do you have an example related this issue ?
预先感谢。
推荐答案
这取决于您要发送到服务器的内容。例如:图像文件或仅是文本(例如来自http表单的文本)。
It depends on what you want to send to the server. for instance: Image file or just Text(like that from a http form).
对于格式为UIIMage的图像文件:
For an image file that is in the format UIIMage:
NSData *imageData = [NSData dataWithContentsOfFile:ImagePath];
或
NSData *imageData = UIImageJPEGRepresentation(myImage.image, 1.0);
设置您的远程URL(例如,如果您使用php)
Set your remote url(for instance if you are using php)
NSString *urlString = "http://yourdomain.com/yourphpfile.php"
其余代码:
NSMutableURLRequest *request2 = [[[NSMutableURLRequest alloc] init] autorelease];
[request2 setURL:[NSURL URLWithString:urlString]];
[request2 setHTTPMethod:@"POST"];
NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request2 addValue:contentType forHTTPHeaderField: @"Content-Type"];
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name='userfile'; filename='"] dataUsingEncoding:NSUTF8StringEncoding]];
//give any name for your file(this case image file example)
[body appendData:[[NSString stringWithString:pic_filename.jpg] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"'\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
//add the file data to the http body
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request2 setHTTPBody:body];
Just Text(类似于php中的$ _GET)
The case of Just Text(Similar to the $_GET in php)
准备要发送的数据。对于表单中的名字
Prepare the data you want to send. For the first name from a form for instance
//You have your first name stored in the_first_name_to_send variable
NSString *f_name = nil;
f_name = [[NSString alloc] initWithFormat:@"%@", the_first_name_to_send];
//Encoding conversion
//This is optional but it ensures that every character encoding type is sent without issues
NSString* escapedUrlStringFirstName =[f_name stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
NSString *string1 = @"firstName=";
NSString *myRequestString;
myRequestString = [string1 stringByAppendingString:escapedUrlStringFirstName];
NSData *myRequestData = [ NSData dataWithBytes: [ myRequestString UTF8String ] length: [ myRequestString length ] ];
NSMutableURLRequest *request2 = [[[NSMutableURLRequest alloc] init] autorelease];
[request2 setHTTPBody: myRequestData ];
[request2 setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];
NSData *returnData2 = [ NSURLConnection sendSynchronousRequest: request returningResponse: nil error: nil ];
returnData2 = nil;
上传图像文件(服务器端yourphpfile.php)
Uploading image file (the server side yourphpfile.php)
$file_tmp = $_FILES['userfile']['tmp_name'];
$filename = $_FILES['userfile']['name'];
使用http post发送文本(服务器端yourphpfile.php)
Sending text using http post (the server side yourphpfile.php)
$fname = $_POST["firstName"];
这篇关于如何创建到Web服务器的Http Post数据?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!