使用 Node.js 连接到 Cloudant CouchDB？

发布于 2024-09-30 07:08:28 字数 1021 浏览 6 评论 0原文

我正在尝试使用 Node.js 连接到 Cloudant 上的 CouchDB 数据库。

这在 shell 上有效：

    curl https://weng:[email protected]/my_app/_all_docs

但是这个 node.js 代码不起作用：

    var couchdb = http.createClient(443, 'weng:[email protected]', true);
    var request = couchdb.request('GET', '/my_app/_all_docs', {
        'Host': 'weng.cloudant.com'
    });
    request.end();
    request.on('response', function (response) {
        response.on('data', function (data) {
            util.print(data);
        });
    });

它给了我这些数据：

    {"error":"unauthorized","reason":"_reader access is required for this request"}

How do I do to list my all Databases with Node.js?

原文

I am trying to connect to my CouchDB database on Cloudant using Node.js.

This worked on the shell:

    curl https://weng:[email protected]/my_app/_all_docs

But this node.js code didn't work:

    var couchdb = http.createClient(443, 'weng:[email protected]', true);
    var request = couchdb.request('GET', '/my_app/_all_docs', {
        'Host': 'weng.cloudant.com'
    });
    request.end();
    request.on('response', function (response) {
        response.on('data', function (data) {
            util.print(data);
        });
    });

It gave me this data back:

    {"error":"unauthorized","reason":"_reader access is required for this request"}

How do I do to list all my databases with Node.js?

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梦忆晨望 2024-10-07 07:08:28

内置的 Node.js http 客户端水平相当低，它不支持开箱即用的 HTTP 基本身份验证。 http.createClient 的第二个参数只是一个主机名。它并不期望那里有凭证。

您有两个选择：

1。自己构建 HTTP 基本授权标头

var Base64 = require('Base64');
var couchdb = http.createClient(443, 'weng.cloudant.com', true);
var request = couchdb.request('GET', '/my_app/_all_docs', {
    'Host': 'weng.cloudant.com',
    'Authorization': 'Basic ' + Base64.encode('weng:password')
});
request.end();
request.on('response', function (response) {
    response.on('data', function (data) {
        util.print(data);
    });
});

您将需要一个 Base64 库，例如用 C 编写的节点，或者纯 JS 的（例如 CouchDB Futon 使用的那个）。

2.使用更高级的 Node.js HTTP 客户端

功能更强大的 HTTP 客户端，例如 Restler ，将使执行上述请求变得更加容易，包括凭据：

var restler = require('restler');
restler.get('https://weng.cloudant.com:443/my_app/_all_docs', {
    username: 'weng',
    password: 'password'
}).on('complete', function (data) {
    util.print(data);
});

The built-in Node.js http client is pretty low level, it doesn't support HTTP Basic auth out of the box. The second argument to http.createClient is just a hostname. It doesn't expect credentials in there.

You have two options:

1. Construct the HTTP Basic Authorization header yourself

var Base64 = require('Base64');
var couchdb = http.createClient(443, 'weng.cloudant.com', true);
var request = couchdb.request('GET', '/my_app/_all_docs', {
    'Host': 'weng.cloudant.com',
    'Authorization': 'Basic ' + Base64.encode('weng:password')
});
request.end();
request.on('response', function (response) {
    response.on('data', function (data) {
        util.print(data);
    });
});

You will need a Base64 lib such as one for node written in C, or a pure-JS one (e.g. the one that CouchDB Futon uses).

2. Use a more high-level Node.js HTTP client

A more featureful HTTP client, like Restler, will make it much easier to do the request above, including credentials:

var restler = require('restler');
restler.get('https://weng.cloudant.com:443/my_app/_all_docs', {
    username: 'weng',
    password: 'password'
}).on('complete', function (data) {
    util.print(data);
});

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烟柳画桥 2024-10-07 07:08:28

Node.js 有很多 CouchDB 模块。

node-couch - CouchDB 连接器
node-couchdb - 完整的 API 实现
node-couchdb-min - 具有低抽象级别和连接池的轻量级客户端。
cradle - 高级缓存 CouchDB 客户端

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忆梦 2024-10-07 07:08:28

只是想将

nano - 用于 Node.js 的简约 couchdb 驱动程序

添加到列表中。它由 nodejitsu 的 CCO Nuno Job 编写，并积极维护。

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离线来电— 2024-10-07 07:08:28

这个答案看起来有点过时了。这是我使用以下有效的 Cloudant 支持的 NPM 节点客户端库验证的更新答案。
https://www.npmjs.com/package/cloudant#getting-started

要回答他关于如何列出他的数据库的问题，请使用以下代码。

//Specify your Cloudant Database Connection URL. For Bluemix format is: https://username:[email protected]

dbCredentials_url = "https://username:[email protected]"; // Set this to your own account 

// Initialize the library with my account. 
// Load the Cloudant library. 
cloudant = require('cloudant')(dbCredentials_url);

// List the Cloudant databases
cloudant.db.list(function(err, allDbs) {
console.log('All my databases: %s', allDbs.join(', ')) });

This answer is looking a bit dated. Here is an updated answer that I verified using the following Cloudant Supported NPM Node Client library that works.
https://www.npmjs.com/package/cloudant#getting-started

And to answer his question on how to list his databases use the following code.

//Specify your Cloudant Database Connection URL. For Bluemix format is: https://username:[email protected]

dbCredentials_url = "https://username:[email protected]"; // Set this to your own account 

// Initialize the library with my account. 
// Load the Cloudant library. 
cloudant = require('cloudant')(dbCredentials_url);

// List the Cloudant databases
cloudant.db.list(function(err, allDbs) {
console.log('All my databases: %s', allDbs.join(', ')) });

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~没有更多了~