How to use pcs api to upload and download files to free Baidu network disk

How to use pcs api to upload and download files to free Baidu network disk_javascript skills

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Release： 2016-05-16 15:10:40

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Baidu personal cloud disk has a large space, is completely free, and provides PCS API for calling and operating files. It is very practical to save some files in daily projects.

Environment preparation:

Enable reading and writing network disk permissions and obtain access_token: http://blog.csdn.net/langyuezhang/article/details/47206621

Baidu official pcs api document: http://developer.baidu.com/wiki/index.php?title=docs/pcs/overview. There are SDKs in various languages. I use laravel5 and directly import it. The php SDK cannot be used yet. It needs to be slightly modified before it can be used.

After reading the above two articles, you can basically use it. Here is the API for directly previewing the image selected by the user and uploading it to the network disk:
https://pcs.baidu.com/rest/2.0/pcs/file?method=upload&path=%2fapps%2wp2pcs%2f1.JPG&access_token=***The red part is fixed because only uploading to this directory is allowed. In fact, The directory corresponding to the network disk is My Network Disk/My Application Data/wp2pcs. There is no need to create a directory before uploading files. You only need to specify the path and it will be created automatically. For example, if you want to upload pictures to /apps/wp2pcs/ Under img, just write /apps/wp2pcs/img/1.jpg as the path. The following is the code to upload the image selected by the user on the web page directly to the network disk after previewing it, referring to the example on the Internet: Preview:

//图片上传预览 IE是用了滤镜。
function previewImage(file, product)
{
getPhotopty();
console.log("previewImage");
uploadAndSubmit(product);
var div = document.getElementById('preview' + product);
var fileName = file.value;
//upload();
if (file.files)
{
var i = 0;
var funAppendImage = function () {
var _file = file.files[i];
if (_file) {
var reader = new FileReader()
reader.onload = function (evt) {
fileName = _file.name;
div.innerHTML += '<div class="col-xs-6 col-md-3"><a style="float:right;cursor:pointer;" onclick="del(this)">X</a><div class="thumbnail"><img id=imghead' + product + fileName + '></div></div>';
var img = document.getElementById('imghead' + product + fileName);
img.src = evt.target.result;
i++;
funAppendImage();
}
reader.readAsDataURL(_file);
}
};
funAppendImage();
}
$('#coverBg').show();
$('#coverDiv').show();
//$("#uploadFrm" + product).submit();
}

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Upload:

var access_token = "***********";
var baseUrl = "https://c.pcs.baidu.com/rest/2.0/pcs/";
function uploadAndSubmit(product) {
console.log("start uploadAndSubmit");
if (typeof FileReader == 'undefined') {
alert("你的浏览器不支持FileReader接口！");
}
var taskName = $("#txtTask").val() + "-" + $("#txtTask2").val();
var form = document.forms["uploadFrm" + product];
console.log("form:" + form);
var fileCtrl = "filectrl" + product;
console.log("filectrl:" + fileCtrl);
//if (form[fileCtrl].files.length > 0)
console.log($("#filectrl" + product)[0]);
if ($("#filectrl" + product)[0].files.length > 0)
{
for (var i = 0; i < $("#filectrl" + product)[0].files.length; i++)
{
var file = form[fileCtrl].files[i];
console.log(file.name);
var filePath = "%2fapps%2fwp2pcs%2f" + taskName + "%2f" + file.name;
console.log("add exif info to db");
getExifIinfo(taskName, file, product, filePath);
//document.getElementById("bytesRead").textContent = file.size;
console.log("start XMLHttpRequest");
var xhr = new XMLHttpRequest();
console.log(access_token);
var url = baseUrl + "file&#63;method=upload&path=%2fapps%2fwp2pcs%2f" + taskName + "%2f" + file.name + "&access_token=" + access_token + "&ondup=overwrite&count=" + i;
console.log(url);
xhr.open("POST", url, true);
var formData = new FormData();
formData.append("file", file);
console.log("onreadystatechange");
xhr.onreadystatechange = function () {
console.log("onreadystatechange start");
//console.log(xhr.status);
if (xhr.readyState == 4) {
if (xhr.status == 200) {
console.log("upload complete");
console.log("response: " + xhr.responseText);
var result = $.parseJSON(xhr.responseText);
if (result.hasOwnProperty("path"))
{
$("#reusltMsg").append('<div class="alert alert-success" role="alert"> 上传成功.</div>');
} else
{
$("#reusltMsg").append('<div class="alert alert-danger" role="alert"> 上传失败.</div>');
}
} else
{
$("#reusltMsg").append('<div class="alert alert-danger" role="alert"> 上传失败(200).</div>');
}
}
$('#coverBg').hide();
$('#coverDiv').hide();
}
xhr.send(formData);
}
} else
{
alert("Please choose a file.");
$('#coverBg').hide();
$('#coverDiv').hide();
}
}

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