目标及进展
我正在尝试使用Node.JS使用Azurue存储Blob服务REST API。到目前为止,我成功地完成了列出容器
和获取Blob服务属性
操作的请求。现在,我正在尝试基于MS的此文档进行放置Blob
。
我遇到了400和403错误,并搜索了类似的问题,即使是关于C#或R而不是Node.JS的问题或问题,阅读它也帮助我理解可能做错了什么并更改我的代码。在这种情况下,签名及其规范化资源和规范化标头缺乏更清晰的文档。
问题
当我认为我解决了签名问题(因为所有的响应都没有告诉我那是问题),现在我不再有这些错误,所有发生的事情就是:我发送请求后它会冻结一段时间;一段时间后我会收到消息:events.js:292
throw er; // Unhandled 'error' event
^
Error: read ECONNRESET
at TLSWrap.onStreamRead (internal/stream_base_commons.js:205:27)
Emitted 'error' event on ClientRequest instance at:
at TLSSocket.socketErrorListener (_http_client.js:426:9)
at TLSSocket.emit (events.js:315:20)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21) {
errno: 'ECONNRESET',
code: 'ECONNRESET',
syscall: 'read'
}
从类似问题的这个问题中,我了解到它是TCP另一端的连接中断。所以很可能不再是签名的问题,但我不知道是什么问题。在Put Blob
之前,我需要进行另一种类型的请求吗?
我尝试更改签名,还尝试创建要上传的本地.txt文件,并尝试从变量上传简单字符串。我不确定数据应该从哪里来进行上传。
我认为我的主要问题是,对于其他错误和问题,我得到了一些信息(最终在阅读了很多资料后)来解决它;但现在我甚至没有得到状态200。
代码
我的创建签名的函数:
/**
* Authorization using HMAC SHA 256.
* @param {String} VERB - Request method to be used (GET, PUT).
* @param {String} strTime - Time of the request, in RFC 1123 Format.
* @param {String} path - Path of the URL, containing the name of the
* container and the query parameters.
*/
create_signature(VERB, strTime, uri, content) {
VERB = VERB.toUpperCase();
// removing first slash
uri = uri.replace("/","");
// separating '/container/blob?q=query&q=query' into 'container/blob' and 'q=query&q=query'
var [path, query] = uri.split("?");
// changing 'q=query&q=query' to 'q:query\nq:query' if '?' is included
query = query ? query.replace(/\=/g,":").replace(/\&/g,"\n") : '';
// without the '?' char the separation is '/container/blob' and ''
const content_type = "text/plain; charset=UTF-8";
const content_length = content.length.toString();
let strToSign = VERB + "\n" + // VERB
"\n" + // Content-Encoding
"\n" + // Content-Language
content_length + "\n" + // Content-Length
"\n" + // Content-MD5
content_type + "\n" + // Content-Type
"\n" + // Date
"\n" + // If-Modified-Since
"\n" + // If-Match
"\n" + // If-None-Match
"\n" + // If-Unmodified-Since
"\n" + // Range
// CanonicalizedHeaders
`x-ms-blob-type:BlockBlob` + "\n" +
`x-ms-date:${strTime}` + "\n" +
`x-ms-version:${this.version}` + "\n" +
// CanonicalizedResource
`/${this.account_name}/${path}`;
console.log(strToSign);
// strToSign = strToSign.toLowerCase();
// strToSign = encodeURIComponent(strToSign);
// generating secret from account key
var secret = CryptoJS.enc.Base64.parse(this.account_key);
// encrypting the signature
var hash = CryptoJS.HmacSHA256(strToSign, secret);
var hashInBase64 = CryptoJS.enc.Base64.stringify(hash);
var auth_sig = `SharedKey ${this.account_name}:` + hashInBase64;
return auth_sig;
}
使用http模块进行请求:
// making the request using the http module:
put_blob(container_name, filename) {
const time_UTC_str = new Date().toUTCString();
var path = `/${container_name}/${filename}`;
const obj = "hello world";
const signature = this.create_signature('PUT', time_UTC_str, path, obj);
const req_params = {
method: 'PUT',
hostname: this.hostname,
path: path,
headers: {
'Authorization': signature,
'x-ms-date': time_UTC_str,
'x-ms-version': this.version,
'x-ms-blob-type': 'BlockBlob',
'Content-Length': obj.length.toString(),
'Content-Type': "text/plain; charset=UTF-8"
}
}
let req = http.request(req_params, this.res_handler);
req.end();
}
响应处理程序函数:
/**
* Callback function that handles and parses the responses,
* including how the search results will be processed.
* @param {object} res - response from request
*/
res_handler = function (res) {
let body = '';
// storing body
res.on('data', (dat) => {
body += dat;
});
// when signaling 'end' flag
res.on('end', () => {
// parsing response
if (!res.complete) {
console.error('The connection was terminated while the message was still being sent');
} else {
// console.log(res);
console.log(`Status: ${res.statusCode} - ${res.statusMessage}`);
}
console.log('Response: ' + body);
});
// handling errors
res.on('error', (err) => {
console.error(`Error ${err.statusCode}: ${err.statusMessage}`);
});
};
PS:我应该尝试另一个云服务,还是它们都很复杂且文档不好?