我正在使用Office JavaScript API为使用Angular的Word编写加载项。将字节数组输出转换为Blob损坏文件
我想通过API检索Word文档,然后将其转换为文件并通过POST将其上传到服务器。
我使用的代码几乎等同于文档的代码,微软提供了这个用例:https://dev.office.com/reference/add-ins/shared/document.getfileasync#example---get-a-document-in-office-open-xml-compressed-format
服务器端点都需要上传到通过多形式发布,所以我创建在其上FORMDATA对象在创建$ http调用时,我追加文件(blob)以及一些元数据。
该文件正在传输到服务器,但是当我打开它时,它已损坏,Word无法再打开它。
根据文档,Office.context.document.getFileAsync函数返回一个字节数组。但是,生成的fileContent变量是一个字符串。当我console.log这个字符串它似乎是压缩数据,就像它应该。
我的猜测是我需要做一些预处理之前,将字符串变成一个Blob。但是哪个预处理?通过atob进行Base64编码似乎没有做任何事情。
let sendFile = (fileContent) => {
let blob = new Blob([fileContent], { type: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' }),
fd = new FormData();
blob.lastModifiedDate = new Date();
fd.append('file', blob, 'uploaded_file_test403.docx');
fd.append('case_id', caseIdReducer.data());
$http.post('/file/create', fd, {
transformRequest: angular.identity,
headers: { 'Content-Type': undefined }
})
.success(() => {
console.log('upload succeeded');
})
.error(() => {
console.log('upload failed');
});
};
function onGotAllSlices(docdataSlices) {
let docdata = [];
for (let i = 0; i < docdataSlices.length; i++) {
docdata = docdata.concat(docdataSlices[i]);
}
let fileContent = new String();
for (let j = 0; j < docdata.length; j++) {
fileContent += String.fromCharCode(docdata[j]);
}
// Now all the file content is stored in 'fileContent' variable,
// you can do something with it, such as print, fax...
sendFile(fileContent);
}
function getSliceAsync(file, nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived) {
file.getSliceAsync(nextSlice, (sliceResult) => {
if (sliceResult.status === 'succeeded') {
if (!gotAllSlices) { // Failed to get all slices, no need to continue.
return;
}
// Got one slice, store it in a temporary array.
// (Or you can do something else, such as
// send it to a third-party server.)
docdataSlices[sliceResult.value.index] = sliceResult.value.data;
if (++slicesReceived === sliceCount) {
// All slices have been received.
file.closeAsync();
onGotAllSlices(docdataSlices);
} else {
getSliceAsync(file, ++nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
}
} else {
gotAllSlices = false;
file.closeAsync();
console.log(`getSliceAsync Error: ${sliceResult.error.message}`);
}
});
}
// User clicks button to start document retrieval from Word and uploading to server process
ctrl.handleClick = () => {
Office.context.document.getFileAsync(Office.FileType.Compressed, { sliceSize: 65536 /*64 KB*/ },
(result) => {
if (result.status === 'succeeded') {
// If the getFileAsync call succeeded, then
// result.value will return a valid File Object.
let myFile = result.value,
sliceCount = myFile.sliceCount,
slicesReceived = 0, gotAllSlices = true, docdataSlices = [];
// Get the file slices.
getSliceAsync(myFile, 0, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
} else {
console.log(`Error: ${result.error.message}`);
}
}
);
};
>> Pff!获取File实例而不使用FileReader API有什么问题?来吧微软! 难道我不知道...非常混乱。 当你说创建一个Uint8Array,你在哪里输入切片? – Squrler