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javascript - 使用 Phonegap : InvalidCastException 上传图片

转载 作者:数据小太阳 更新时间:2023-10-29 05:33:55 24 4
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我正在尝试使用 Phonegap 将文件上传到我的服务器。当出现以下错误时,我目前陷入困境:

InvalidCastException
Failed to deserialize WP7CordovaClassLib.Cordova.Commands.FileTransfer+UploadOptions[] with JSON value :: ["{\"filePath\":\"/CapturedImagesCache/PhotoChooser-51766419-c657-46db-a53d-f09bee300a89.jpg\",\"server\":\"http://server.myapp.srv.co.nz/pages/fileupload\",\"fileKey\":\"file\",\"fileName\":\"PhotoChooser-51766419-c657-46db-a53d-f09bee300a89.jpg\",\"mimeType\":\"image/jpg\",\"params\":\"value1=test&value2=param\",\"chunkedMode\":false}"]

HTML + Javascript

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="format-detection" content="telephone=no" />
<title>File Transfer Example</title>

</head>
<body>
<button id="uploadPhotoButton">Upload a Photo</button>

<script type="text/javascript" src="cordova-2.2.0.js"></script>
<script type="text/javascript" src="js/jquery-1.8.2.min.js"></script>
<script type="text/javascript" src="js/jquery.mobile-1.2.0.min.js"></script>
<script type="text/javascript" src="js/camera.js"></script>
<script type="text/javascript">

$(document).one("pause", function () {
console.log('Paused.');
});

$(document).one("resume", function () {
console.log('Resumed.');
});

$(document).one("deviceready", function () {
console.log('Device is ready.');
});

$(document).one("backbutton", function () {
console.log('Back button pressed.');
});

$(document).ready(function () {
console.log('DOM is ready.');

$(document).on("click", "#uploadPhotoButton", function (e) {
console.log('clicked button');
getImage();
});


function getImage() {
// Retrieve image file location from specified source
navigator.camera.getPicture(uploadPhoto, function (message) {
alert('get picture failed');
}, {
quality: 50,
destinationType: navigator.camera.DestinationType.FILE_URI,
sourceType: navigator.camera.PictureSourceType.PHOTOLIBRARY
}
);

}

function uploadPhoto(imageURI) {
var options = new FileUploadOptions();
options.fileKey = "file";
options.fileName = imageURI.substr(imageURI.lastIndexOf('/') + 1);
options.mimeType = "image/jpeg";

var params = new Object();
params.value1 = "test";
params.value2 = "param";

options.params = params;
options.chunkedMode = false;

var ft = new FileTransfer();
ft.upload(imageURI, "http://my.server.co.nz/pages/fileupload", win, fail, options);
}

function win(r) {
console.log("Code = " + r.responseCode);
console.log("Response = " + r.response);
console.log("Sent = " + r.bytesSent);
alert(r.response);
}

function fail(error) {
alert("An error has occurred: Code = " = error.code);
}
});

</script>
</body>
</html>

完整的错误日志。

GapBrowser_Navigated :: /app/www/index.html#/app/www/uploadtest.html
Log:"clicked button"
The thread '<No Name>' (0xf55026a) has exited with code 0 (0x0).
The thread '<No Name>' (0xe3f0326) has exited with code 0 (0x0).
INFO: AppDeactivated
INFO: AppActivated
Log:"Paused."
The thread '<No Name>' (0xf1a02e6) has exited with code 0 (0x0).
Log:"Resumed."
The thread '<No Name>' (0xf2a01d2) has exited with code 0 (0x0).
options = ["{\"filePath\":\"/CapturedImagesCache/PhotoChooser-51766419-c657-46db-a53d-f09bee300a89.jpg\",\"server\":\"http://my.server.co.nz/pages/fileupload\",\"fileKey\":\"file\",\"fileName\":\"PhotoChooser-51766419-c657-46db-a53d-f09bee300a89.jpg\",\"mimeType\":\"image/jpg\",\"params\":\"value1=test&value2=param\",\"chunkedMode\":false}"]
A first chance exception of type 'System.InvalidCastException' occurred in System.ServiceModel.Web.dll
A first chance exception of type 'System.InvalidCastException' occurred in System.ServiceModel.Web.dll
InvalidCastException
Failed to deserialize WP7CordovaClassLib.Cordova.Commands.FileTransfer+UploadOptions[] with JSON value :: ["{\"filePath\":\"/CapturedImagesCache/PhotoChooser-51766419-c657-46db-a53d-f09bee300a89.jpg\",\"server\":\"http://server.myapp.srv.co.nz/pages/fileupload\",\"fileKey\":\"file\",\"fileName\":\"PhotoChooser-51766419-c657-46db-a53d-f09bee300a89.jpg\",\"mimeType\":\"image/jpg\",\"params\":\"value1=test&value2=param\",\"chunkedMode\":false}"]
A first chance exception of type 'System.NullReferenceException' occurred in Lion.MyApp.dll
The thread '<No Name>' (0xfdc025e) has exited with code 0 (0x0).
Log:"Error in error callback: FileTransfer1325332352 = ReferenceError: Invalid left-hand side in assignment"
The thread '<No Name>' (0xfa60286) has exited with code 0 (0x0).

有没有人知道如何让它发挥作用?

谢谢!

W

最佳答案

我认为您正在扭曲您的期权值(value)。您需要传递 JSON 还是实际对象?

现在您正在传递一个包含文本的数组。

options = ["{\"filePath\":\"/CapturedImagesCache/PhotoChooser-51766419-c657-46db-a53d-f09bee300a89.jpg\",\"server\":\"http://my.server.co.nz/pages/fileupload\",\"fileKey\":\"file\",\"fileName\":\"PhotoChooser-51766419-c657-46db-a53d-f09bee300a89.jpg\",\"mimeType\":\"image/jpg\",\"params\":\"value1=test&value2=param\",\"chunkedMode\":false}"]

错误似乎涉及反序列化问题。

关于javascript - 使用 Phonegap : InvalidCastException 上传图片,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13922410/

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