'Crypto' node.js 模块：找不到包错误的包主文件答案

【问题标题】：'Crypto' node.js module: Cannot find package main file for package error'Crypto' node.js 模块：找不到包错误的包主文件
【发布时间】：2015-04-08 04:51:17
【问题描述】：

我已将加密模块 (npm install crypto) 安装到我的 node.js 项目中，但是当我启动我的应用程序时出现此错误：

Error: Cannot find package main file for package: /opt/PropertyFinder/node_modules/crypto
    at DependecyGraph.resolveDependency (/opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:199:13)
    at /opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:117:22
    at Array.forEach (native)
    at collect (/opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:115:25)
    at /opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:130:9
    at Array.forEach (native)
    at collect (/opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:115:25)
    at /opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:130:9
    at Array.forEach (native)
    at collect (/opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:115:25)
    at /opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:130:9
    at Array.forEach (native)
    at collect (/opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:115:25)
    at /opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:130:9
    at Array.forEach (native)
    at collect (/opt/PropertyFinder/node_modules/react-native/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js:115:25)
[7:40:11 PM] <START> request:/index.ios.bundle

这是什么意思？我在哪里可以找到该包的主文件？

【问题讨论】：

标签： node.js cryptography node-modules

【解决方案1】：

也许您打算使用 Node.js 的内置 crypto 模块。

如果是这样，您不需要通过npm 安装它，并且应该可以在您的代码中简单地使用require('crypto')。

（先使用npm uninstall crypto删除“重复”。）

【讨论】：

【解决方案2】：

错误是说项目没有包含入口脚本。它没有index.js or another "main" script specified 来允许一般要求该软件包。

var crypto = require('/opt/PropertyFinder/node_modules/crypto');

它只包含两个松散的模块，md5.js 和 sha1.js，您必须单独要求：

var md5 = require('/opt/PropertyFinder/node_modules/crypto/md5');
var sha1 = require('/opt/PropertyFinder/node_modules/crypto/sha1');

【讨论】：