如何使用 POST 上传文件附件？

Question

我创建了一个音频文件，我想附加到 Salesforce 中的 "Order" 对象。文件的路径正确位于 theSoundPath.

以下代码导致错误：'NSInvalidArgumentException', reason: 'Invalid type in JSON write (NSConcreteData)'

我正在按照 API 的要求对文件进行 base64 编码。但我也在想这就是抛出这个错误的原因。如果有人能指出我正确的方向，我将不胜感激。

下面是相关代码（使用 SwiftyJSON 和 Alamofire）：

    let encodedSound = NSFileManager.defaultManager().contentsAtPath(self.theSoundPath)
    let encodedBase64Sound = encodedSound!.base64EncodedDataWithOptions(nil)
    let tokenParam = "Bearer " + theToken // Bearer prefix required by API
    let theWriteURL = theInstance + "/services/data/v33.0/sobjects/Order/" + self.theOrder + "/Attachment/"
    let URL = NSURL(string: theWriteURL)!
    let mutableURLRequest = NSMutableURLRequest(URL: URL)
    mutableURLRequest.HTTPMethod = "POST"

    let parameters = [
        "AccountId": "001xxxxxxxxxxxx",
        "Name": "testfile.aac",
        "Body": encodedBase64Sound
    ]

    var JSONSerializationError: NSError? = nil
    mutableURLRequest.HTTPBody = NSJSONSerialization.dataWithJSONObject(parameters, options: nil, error: &JSONSerializationError)
    mutableURLRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
    mutableURLRequest.setValue(tokenParam, forHTTPHeaderField: "Authorization")

    Alamofire.request(mutableURLRequest)
        .responseJSON { (req, res, json, error) in // . . . etc.

Answer 1

来自NSJSONSerialization's doc

An object that may be converted to JSON must have the following properties:

The top level object is an NSArray or NSDictionary.

All objects are instances of NSString, NSNumber, NSArray, NSDictionary, or NSNull.

All dictionary keys are instances of NSString.

Numbers are not NaN or infinity.

但是你尝试序列化一个NSData对象，结果

encodedBase64Sound = encodedSound!.base64EncodedDataWithOptions(nil)

而是创建一个 base64 字符串

encodedBase64Sound = encodedSound!.base64EncodedStringWithOptions(nil)

如何使用 POST 上传文件附件？

How do I upload a file attachment using POST?

swift

salesforce