Question

我正在尝试使用iOS中的multi-part form encoding上传文字。

我做了什么：

我已尝试通过ios Upload Image and Text using HTTP POST。

中提供的信息

问题：

我把登录服务器端，这是我从IOS App收到的内容。

key名称没问题。但是，我收到的value为null

"443" "POST" "/api/private/json/" "content=null&scope=null&action=null&documentname=null&apikey=null"

我的代码：

    NSMutableDictionary *params = [NSMutableDictionary new];
    [params setObject:@"XXXXX" forKey:@"apikey"];
    [params setObject:@"DataAPI" forKey:@"scope"];
    [params setObject:@"push" forKey:@"action"];
    [params setObject:docName forKey:@"documentName"];
    [params setObject:content forKey:@"content"];
    [params setObject:authToken forKey:@"authtoken"];

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
    [request setHTTPShouldHandleCookies:NO];
    [request setTimeoutInterval:30];
    [request setHTTPMethod:@"POST"];

    // set Content-Type in HTTP header
    NSString *boundary = @"V2ymHFg03ehbqgZCaKO6jy";

    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
    [request setValue:contentType forHTTPHeaderField: @"Content-Type"];

    NSMutableData *body = [NSMutableData data];



    // add params (all params are strings)
    for (NSString *param in params) {
        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", param] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithFormat:@"%@\r\n", [params objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]];

    }

    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];


    // setting the body of the post to the reqeust
    [request setHTTPBody:body];
    NSString *myString = [[NSString alloc] initWithData:body encoding:NSUTF8StringEncoding];


    NSLog(@"%@",myString);
    // set the content-length
    NSString *postLength = [NSString stringWithFormat:@"%d", [body length]];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];

    // set URL
    [request setURL:url];


    NSURLResponse *response;
    NSData *POSTReply = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
    NSString *theReply = [[NSString alloc] initWithBytes:[POSTReply bytes] length:[POSTReply length] encoding: NSASCIIStringEncoding];
    NSLog(@"Reply: %@", theReply);

我无法理解这个问题，无论是来自服务器端还是来自我的代码。

感谢您分享您的答案。

Answer 1

您没有附加终止边界。

此：

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

应该是这样的：

[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

修改

你实际上缺少了一些东西。您没有为数据设置内容类型，而且您缺少一些新行。

你的循环应如下所示：

for (NSString *param in params) { [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Type: text/plain\r\n"] dataUsingEncoding:NSUTF8StringEncoding]] [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", param] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"%@\r\n", [params objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]]; } [body appendData:[[NSString stringWithFormat:@"\r\n\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

<强> EDIT2：

以下是正确处理相同请求的服务器端代码示例：

#!/usr/bin/env python import web urls = ("/", "Index") app = web.application(urls, globals()) class Index(object): def POST(self): x = web.input() print x print x['apikey'] print x['scope'] return 'success' if __name__ == "__main__": app.run()

输出：

<Storage {'scope': u'asd', 'apikey': u'123\r\n'}> 123 asd 127.0.0.1:60044 - - [02/Dec/2013 15:02:55] "HTTP/1.1 POST /" - 200 OK

示例控制台应用。您可以使用clang编译 - clang -framework Foundation test_post.m -o test_post

#import <Foundation/Foundation.h> @interface Uploader : NSObject <NSURLConnectionDataDelegate> @property (nonatomic, strong) NSDictionary *parameters; @property (nonatomic, strong) NSURLConnection *connection; @end @implementation Uploader - (id)init { if (self = [super init]) { } return self; } - (NSMutableURLRequest*)createRequest { NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; [request setURL:[NSURL URLWithString:@"http://localhost:8080/"]]; [request setHTTPMethod:@"POST"]; NSString *boundary = @"0xB0un9ArY"; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]; [request addValue:contentType forHTTPHeaderField:@"Content-Type"]; [request setValue:@"1.0" forHTTPHeaderField:@"MIME-Version"]; [request setValue:@"keep-alive" forHTTPHeaderField:@"Connection"]; NSMutableData *body = [NSMutableData data]; for (NSString *key in [self.parameters allKeys]) { [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Type: text/plain\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", key] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"%@\r\n", (self.parameters)[key]] dataUsingEncoding:NSUTF8StringEncoding]]; } [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [request setHTTPBody:body]; return request; } - (void)upload { NSMutableURLRequest *request = [self createRequest]; self.connection = [[NSURLConnection alloc] initWithRequest:request delegate:self]; if (self.connection) [self.connection start]; } - (void)connection:(NSURLConnection*)connection didReceiveResponse:(NSURLResponse*)response {NSLog(@"connection:didReceiveResponse: %@", response);} - (void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data {NSLog(@"connection: didReceiveData: %@", data);} - (void)connection:(NSURLConnection*)connection didFailWithError:(NSError*)error {NSLog(@"connection: didFailWithError: %@", error);} - (void)connectionDidFinishLoading:(NSURLConnection*)connection { NSLog(@"connectionDidFinishLoading:"); } @end int main(int argc, char *argv[]) { @autoreleasepool { NSRunLoop *runLoop = [NSRunLoop currentRunLoop]; Uploader *uploader = [[Uploader alloc] init]; uploader.parameters = @{@"apikey": @"123", @"scope": @"asd"}; [uploader upload]; [runLoop run]; } return 0; }

Answer 2

这应该解决它：

而不是：

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

写

[body appendData:[[NSString stringWithFormat:@"--%@--", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

（终止CRLF是可选的）

请注意如果你写这个：

for (NSString *param in params) {
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Type: text/plain\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", param] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"%@\r\n", [params objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]];
}
[body appendData:[[NSString stringWithFormat:@"\r\n\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

在边界定界符之前的所有内容，例如\r\n--<boundary>在概念上属于数据，例如到参数值。

同样，“破折号边界”（CRLF）的前面--<boundary>属于分隔符。

从概念上讲，第一个分隔符也必须以CRLF开头：

`CRLF--<boundary>`

然而，似乎NSURLConnection已经在消息头之后放置了一个CRLF 。所以我们最终得到了这个：

Content-Type: multipart/form-data; boundary="xyz"CRLF <other header>CRLF CRLF <-- added by NSURLConnection, which is debatable if this is correct ... multipart body starts here

服务器应忽略在标题之后的任何字节和多部分开始之前的。这种垃圾称为preamble：

Content-Type: multipart/form-data; boundary="xyz"CRLF <other header>CRLF <preamble bytes>CRLF--xyz ^~~~~~~~~ delimiter ....
例如，
preamble可能为空，也可能包含任意数量的CRLF。

body-part由MIME标题和部分正文数据组成，位于边界之后，但严格来说不是立即：

<preamble-bytes>CRLF--xyz<transport-padding>CRLF<body-part> ^~~~~~~~~ delimiter ^~~~~~~~~~~ MIME headers and data

其中<transport-padding>是任意数量的空格或水平制表符，也就是说，它可能为空。

这一切都意味着我们应该能够使用以下行作为非终止定界符（对于第一个和任何后续的非终止边界定界符）加上CRLF：

[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

然后紧随其后的body-part（从标题开始，然后是数据）：

[body appendData:[[NSString stringWithFormat:@"Content-Type: text/plain\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", key] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"%@", (self.parameters)[key]] dataUsingEncoding:NSUTF8StringEncoding]];

这四行可以在每个参数的循环中使用。

可以按如下方式添加终止分隔符：

[body appendData:[[NSString stringWithFormat:@"\r\n--%@--", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

终止CRLF是可选的。最后一个CRLF之后的任何字节都属于epilogue，服务器将忽略该字节。

见：RCF 2046 http://www.ietf.org/rfc/rfc2046.txt。

Answer 3

NSURL *url = [NSURL URLWithString:@"http://210.7.64.98/360videos/webservices/devicetoken.php"];
NSDictionary *postDict = [NSDictionary dictionaryWithObjectsAndKeys:devToken1, @"token",
                          @"iphone", @"device_type", nil];
NSData *postData = [self encodeDictionary:postDict];

// Create the request
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:[NSString stringWithFormat:@"%d", postData.length] forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded charset=utf-8" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];




dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    // Peform the request
    NSURLResponse *response;
    NSError *error = nil;
    NSData *receivedData = [NSURLConnection sendSynchronousRequest:request
                                                 returningResponse:&response
                                                             error:&error];
    if (error) {
        // Deal with your error
        if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
            NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse*)response;
            NSLog(@"HTTP Error: %d %@", httpResponse.statusCode, error);
            return;
        }
        NSLog(@"Error %@", error);
        return;
    }


    NSString *responeString = [[NSString alloc] initWithData:receivedData
                                                    encoding:NSUTF8StringEncoding];
    NSLog(@"token Response : %@",responeString);
});

//这里是编码方法

（NSData *）encodeDictionary：（NSDictionary *）dictionary { NSMutableArray * parts = [[NSMutableArray alloc] init]; for（NSString *字典中的键）{ NSString * encodedValue = [[dictionary objectForKey：key] stringByAddingPercentEscapesUsingEncoding：NSUTF8StringEncoding]; NSString * encodedKey = [key stringByAddingPercentEscapesUsingEncoding：NSUTF8StringEncoding]; NSString * part = [NSString stringWithFormat：@“％@ =％@”，encodedKey，encodedValue]; [parts addObject：part]; } NSString * encodedDictionary = [parts componentsJoinedByString：@“＆amp;”]; return [encodedDictionary dataUsingEncoding：NSUTF8StringEncoding]; } //可能会对你有所帮助。

通过多部分HTTP请求上传ios文本

3 个答案: