[IOS]使用同步方式透過NSURLConnection上傳檔案-以圖片檔案為例

使用同步的方式上傳圖片檔

呼叫：

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//上傳的url,上傳的image data 一個檔案file:image.jpg 一個參數path:path

NSString *result=[self uploadFile:url fileData:data filePath:path];

函式：

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- (NSString *)uploadFile:(NSString *)url fileData:(NSData *)paramData filePath:(NSString *)path{

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

    [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];

    [request setTimeoutInterval:30];

    [request setHTTPMethod:@"POST"];

    

    NSString *boundary = @"0xKhTmLbOuNdArY";//NSURLConnection is very sensitive to format.

    // set Content-Type in HTTP header

    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];

    [request setValue:contentType forHTTPHeaderField: @"Content-Type"];

    

    // post body

    NSMutableData *body = [NSMutableData data];

    

    // add params (all params are strings)

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

    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", @"path"] dataUsingEncoding:NSUTF8StringEncoding]];

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

    

    // add image data

    

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

    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", @"file"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"Content-Type: image/jpeg\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:paramData];

    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    

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

    // setting the body of the post to the reqeust

    [request setHTTPBody:body];

    // set the content-length

    NSString *postLength = [NSString stringWithFormat:@"%d", [body length]];

    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];

    

    // set URL

    [request setURL:[NSURL URLWithString:url]];

    

    NSData *returnData=[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

    //看returnData出來的值

    NSLog(@"%@",[[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]);

    NSString *checkData=[NSString stringWithFormat:@"%@",[[NSString alloc] 

    return checkData;  

}