NSURLRequest - 为 NSURLRequest POST Body 编码 url (iPhone Objective-C)
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/787582/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
NSURLRequest - encode url for NSURLRequest POST Body (iPhone objective-C)
提问by Corey Floyd
I am sending a post using NSURLRequest.
我正在使用 NSURLRequest 发送帖子。
NSURL *url = [NSURL URLWithString:someUrlString];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
NSString *msgLength = [NSString stringWithFormat:@"%d", [parameterString length]];
[theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];
[theRequest setHTTPMethod:@"POST"];
[theRequest setHTTPBody: [parameterString dataUsingEncoding:NSUTF8StringEncoding]];
Within the body of the Request I am encoding the following NVP:
在请求的正文中，我正在对以下 NVP 进行编码：
returnURL=http://someSite.com
returnURL= http://someSite.com
The post is going through successfully, but I get an error back. The error states an invalid url.
该帖子已成功通过，但我收到错误消息。该错误表明网址无效。
So, I changed it to:
所以，我把它改成了：
returnURL=http:%2F%2FsomeSite.com
returnURL=http:%2F%2FsomeSite.com
With the same error.
有同样的错误。
I have also double checked it with Todd Ditchendorf's HTTP Client, with the same results.
我还用 Todd Ditchendorf 的 HTTP Client 仔细检查了它，结果相同。
I know I must be encoding this wrong can someone tell me what I am doing wrong?
我知道我必须编码这个错误有人可以告诉我我做错了什么吗？
Thanks Corey
谢谢科里
**UPDATE: Thanks to those who answered. I missed an ampersand in my NVP values. So of course, as soon as I fixed it, everything was fine. What I suspectede, the encoding of a url in the body of the post was incorrect. I am not using the ASIHTTPRequest framework, but it did help me troubleshoot the problem (overkill for what I needed). **
**更新：感谢那些回答。我在 NVP 值中遗漏了一个和号。所以当然，一旦我修复它，一切都很好。我怀疑，帖子正文中网址的编码不正确。我没有使用 ASIHTTPRequest 框架，但它确实帮助我解决了问题（对于我需要的东西来说太过分了）。**
回答by Alex Reynolds
Consider using Ben Copsey's ASIHTTPRequestframework for generating and sending synchronous and asynchronous HTTTP requests (POST and GET):
考虑使用 Ben Copsey 的ASIHTTPRequest框架来生成和发送同步和异步 HTTTP 请求（POST 和 GET）：
ASIFormDataRequest *request = [[[ASIFormDataRequest alloc] initWithURL:@"http://someSite.com"] autorelease];
[request setPostValue:@"myValue1" forKey:@"myFormField1"];
[request setPostValue:@"myValue2" forKey:@"myFormField2"];
// etc.
[request start];
NSError *error = [request error];
if (!error)
NSString *response = [request responseString];
His framework is a huge time-saver.
他的框架是一个巨大的节省时间。
回答by Chris Lundie
I don't know if this solves your problem, but
我不知道这是否能解决您的问题，但是
[parameterString length]
is often not be equal to the length of
通常不等于长度
[parameterString dataUsingEncoding:NSUTF8StringEncoding]
because UTF8 encodes characters with varying numbers of bytes.
因为 UTF8 编码具有不同字节数的字符。
