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form.js
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form.js
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const conf = require('../conf');
const util = require('../util');
const rpc = require('../rpc');
const fs = require('fs');
const getCrc32 = require('crc32');
const path = require('path');
const mime = require('mime');
const Readable = require('stream').Readable;
const formstream = require('formstream');
const zone = require('../zone');
const digest = require('../auth/digest');
exports.FormUploader = FormUploader;
exports.PutExtra = PutExtra;
function FormUploader(config) {
this.config = config || new conf.Config();
}
// 上传可选参数
// @params fname 请求体中的文件的名称
// @params params 额外参数设置,参数名称必须以x:开头
// @param mimeType 指定文件的mimeType
// @param crc32 指定文件的crc32值
// @param checkCrc 指定是否检测文件的crc32值
function PutExtra(fname, params, mimeType, crc32, checkCrc) {
this.fname = fname || '';
this.params = params || {};
this.mimeType = mimeType || null;
this.crc32 = crc32 || null;
this.checkCrc = checkCrc || 1;
}
FormUploader.prototype.putStream = function(uploadToken, key, fsStream,
putExtra, callbackFunc) {
putExtra = putExtra || new PutExtra();
if (!putExtra.mimeType) {
putExtra.mimeType = 'application/octet-stream';
}
if (!putExtra.fname) {
putExtra.fname = key ? key : 'fname';
}
fsStream.on("error", function(err) {
//callbackFunc
callbackFunc(err, null, null);
return;
});
var useCache = false;
var that = this;
if (this.config.zone) {
if (this.config.zoneExpire == -1) {
useCache = true;
} else {
if (!util.isTimestampExpired(this.config.zoneExpire)) {
useCache = true;
}
}
}
var accessKey = util.getAKFromUptoken(uploadToken);
var bucket = util.getBucketFromUptoken(uploadToken);
if (useCache) {
createMultipartForm(uploadToken, key, fsStream, putExtra, function(
postForm) {
putReq(that.config, postForm, callbackFunc);
});
} else {
zone.getZoneInfo(accessKey, bucket, function(err, cZoneInfo,
cZoneExpire) {
if (err) {
callbackFunc(err, null, null);
return;
}
//update object
that.config.zone = cZoneInfo;
that.config.zoneExpire = cZoneExpire;
//req
createMultipartForm(uploadToken, key, fsStream,
putExtra,
function(postForm) {
putReq(that.config, postForm, callbackFunc);
});
});
}
}
function putReq(config, postForm, callbackFunc) {
//set up hosts order
var upHosts = [];
if (config.useCdnDomain) {
if (config.zone.cdnUpHosts) {
config.zone.cdnUpHosts.forEach(function(host) {
upHosts.push(host);
});
}
config.zone.srcUpHosts.forEach(function(host) {
upHosts.push(host);
});
} else {
config.zone.srcUpHosts.forEach(function(host) {
upHosts.push(host);
});
config.zone.cdnUpHosts.forEach(function(host) {
upHosts.push(host);
});
}
var scheme = config.useHttpsDomain ? "https://" : "http://";
var upDomain = scheme + upHosts[0];
rpc.postMultipart(upDomain, postForm, callbackFunc);
}
// 上传字节
//
FormUploader.prototype.put = function(uploadToken, key, body, putExtra,
callbackFunc) {
var fsStream = new Readable();
fsStream.push(body);
fsStream.push(null);
putExtra = putExtra || new PutExtra();
return this.putStream(uploadToken, key, fsStream, putExtra, callbackFunc)
}
FormUploader.prototype.putWithoutKey = function(uploadToken, body, putExtra,
callbackFunc) {
return this.put(uploadToken, null, body, putExtra, callbackFunc);
}
function createMultipartForm(uploadToken, key, fsStream, putExtra, callbackFunc) {
var postForm = formstream();
postForm.field('token', uploadToken);
if (key) {
postForm.field('key', key);
}
postForm.stream('file', fsStream, putExtra.fname, putExtra.mimeType);
//putExtra params
for (var k in putExtra.params) {
if (k.startsWith("x:")) {
postForm.field(k, putExtra.params[k].toString());
}
}
var fileBody = [];
fsStream.on('data', function(data) {
fileBody.push(data);
});
fsStream.on('end', function() {
fileBody = Buffer.concat(fileBody);
var bodyCrc32 = parseInt("0x" + getCrc32(fileBody));
postForm.field('crc32', bodyCrc32);
});
callbackFunc(postForm);
}
// 上传本地文件
// @params uploadToken 上传凭证
// @param key 目标文件名
// @param localFile 本地文件路径
// @param putExtra 额外选项
// @param callbackFunc 回调函数
FormUploader.prototype.putFile = function(uploadToken, key, localFile, putExtra,
callbackFunc) {
putExtra = putExtra || new PutExtra();
var fsStream = fs.createReadStream(localFile);
if (!putExtra.mimeType) {
putExtra.mimeType = mime.getType(localFile);
}
if (!putExtra.fname) {
putExtra.fname = path.basename(localFile);
}
return this.putStream(uploadToken, key, fsStream, putExtra, callbackFunc);
}
FormUploader.prototype.putFileWithoutKey = function(uploadToken, localFile,
putExtra, callbackFunc) {
return this.putFile(uploadToken, null, localFile, putExtra, callbackFunc);
}