$cordovaFile.writeFile 写入空白文件

Question

我在 $cordovaFile 中使用 writeFile(path, file, data, replace) 方法写入新文件（pdf, jpg, text ）。作为数据，我从 restful 服务获得数据流..（它看起来像 %PDF-1.5↵%��↵1 0 obj↵..）问题是我可以写一个文件，但它打开时是一个空白的 pdf，但文件大小是正确的。对于数据字段，我使用了数据流本身，blob object(var blob = new Blob([data], { type: 'application/pdf' });) ,

这是我的代码

var path = cordova.file.externalRootDirectory;
$cordovaFile.writeFile(path, "myCreatedPdf.pdf", blob, true)
.then(function(success){
    console.log("file");
    $cordovaFileOpener2.open(
        success.target.localURL,'application/pdf'
    );
}, function (error) {
    console.log("error");
});

请帮帮我……有什么想法吗……？

Answer 1

使用此方法可以正确写入文本文件。问题是 .pdf .png 文件写入。所以我用这个方法写文件。对我有用。

function saveFile(pdfBlob, fileName) {
    var deferred = $q.defer();

    var filePath = "";
    try {
        console.log('SaveFile: requestFileSystem');
        window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
    } catch (e) {
        console.error('SaveFile_Err: ' + e.message);
        deferred.reject(e);
        throw ({ code: -1401, message: 'unable to save report file' });
    }


    function gotFS(fileSystem) {
        fileSystem.root.getDirectory("TokenReader", { create: true }, gotDir);
    }

    function gotDir(dirEntry) {
        //console.error('SaveFile: gotFS --> getFile');
        //dirEntry.getFile("rptSampleNew.pdf", {create: true, exclusive: false}, gotFileEntry, fail);
        dirEntry.getFile(fileName, { create: true, exclusive: false }, gotFileEntry, fail);
    }

    function gotFileEntry(fileEntry) {
        //console.error('SaveFile: gotFileEntry --> (filePath) --> createWriter');
        filePath = fileEntry.toURL();
        fileEntry.createWriter(gotFileWriter, fail);
    }

    function gotFileWriter(writer) {
        //console.error('SaveFile: gotFileWriter --> write --> onWriteEnd(resolve)');
        writer.onwriteend = function (evt) {
            $timeout(function () {
                deferred.resolve(filePath);
            }, 100);
        };

        writer.onerror = function (e) {
            console.log('writer error: ' + e.toString());
            deferred.reject(e);
        };

        writer.write(pdfBlob);
    }

    function fail(error) {
        console.log(error.code);
        deferred.reject(error);
    }

    return deferred.promise;
}

$cordovaFile.writeFile 写入空白文件

$cordovaFile.writeFile writes blank file

pdf

device

writefile

local-storage

cordova