sandbox | 易学教程

Same-origin request causes “Access-Control-Allow-Origin doesn’t match” error, though origin of course matches. Note: has CSP policy w/ “sandbox”

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问题 When the exact same URL is being used in both by CORS and its web pages' URL, I still get the same error messages in my Firefox development console. Browser console messages were: Cross-Origin Request Blocked: \ The Same Origin Policy disallows reading the remote resource \ at https://egbert.net/fonts/fontawesome-webfont.woff2?v=4.7.0. \ (Reason: CORS header ‘Access-Control-Allow-Origin’ does not \ match ‘https://egbert.net’). Header Settings, lighttpd Server Access-Control-Allow-Origin:

Why multi-threaded python program slow on ec2 micro-instance?

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问题 I am working on a Online Judge code checker.My code uses multi-threading in python 2.7.The same program on my local machine (i core 3 RAM 4GB) evaluates about 1000 submisions in 1 minute 10 seconds. But when I run it on ec2 micro instance(about 600 MB RAM) it takes about 40 minutes(It gets slow for some random seconds).To know the reason I broke down things. First this is how my evaluator works: I have a main program worker.py , which creates multiple threads The main thread pulls submissions

ipfa正舵者IPFS官方周报

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IPFS+Filecoin的演变在准备Filecoin的提升周之前，我们的一些生态系统领导人分享了他们对我们与IPFS和Filecoin一起构建的Web3生态系统的动机和增长的看法。IPFS和Filecoin创始人Juan Benet，Textile联合创始人兼首席执行官Andrew Hill都在Twitter上分享了他们的想法。互联网的未来将由技术创新者决定 Web3，IPFS和Filecoin最近成为舆论关注的焦点，该论点是针对Marvin Ammori撰写的针对五家主要科技公司所拥有的不平衡的权力平衡问题而提出的去中心化优点的。请继续阅读以了解Web 2.0的遗留知识，以及监管如何对您有帮助或有害。 Infura推出对Filecoin开发者的支持我们Infura的朋友最近通过Filecoin Network API Beta交付了对Filecoin的支持，部分用户现在可以加入。Beta版允许开发人员连接到Filecoin主网，并使用Infura仪表板构建基于Filecoin的应用程序。将您的应用程序连接到Filecoin从未如此简单！全新的IPFS 展示js-ipfs-fetch，这是一个为ipfs：//和ipns：//提供获取接口的模块。教程：该视频来自3Box社区，使用Vue.js和3Box构建“ Twitter” Dapp。

bazel简介（二）——从makefile向bazel转变（使用genrule）

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0x01 背景上篇中已经介绍了bazel的基本工作原理和相关的概念。这篇将继续介绍下，现有的makefile构建工程如何切换到bazel构建系统。 bazel提供了丰富的扩展方式，当然也支持从目前的makefile过渡到bazel构建。再次说明下其特性：多语言支持，并且支持扩展到任何语言的构建。扩展DSL是starlyke语言，为Python的一个子集，容易上手。这一点是cmake和其他构建系统不具备的。支持缓存。支持分布式构建。支持最小化构建。在一个大型系统中，一个人可能只需要负责其中的一个小组件，这个组件可能又依赖其他组件。当这个组件需要更新测试时，只希望去构建这个组件依赖的组件和这个组件本身，其他不相关的可以不构建，这样可以使用构建过程更快捷。bazel就支持这种方式。 0x02 makefile的问题上文中说过makefile在处理小规模软件时还不错，当规模增大时，makefile有以下问题。各个组件之间的依赖难以管理。 makefile只支持将所有的源码放在一个目录下，然后由顶层的。这个依赖关系只能是有经验的人知道，新人想最小化编译时，只能试错，发现有依赖未构建时，再去手动构建。增量式构建难以控制。这一点和第1点是相关的，因为依赖不能自动化构建，所以增量式构建也不具备。构建速度不足，难以做缓存。 makefile本身不支持缓存

Mac OS In App Sandbox Entitlements Directory Read Issue

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问题 I am having an issue with my App Sandbox entitlements. My Mac OS app allows a user to open an XML file. When that file is parsed it reads a image file in the same directory as XML file. If App Sandbox is False, the image loads just fine. If App Sandbox is True, the image fails to load. (The XML file is still read) The App Sandbox must be True to push to the App Store. I have tried com.apple.security.files.user-selected.read-write = TRUE com.apple.security.temporary-exception.files.home

ANY possible way to run the clang compiler from a Sandboxed app?

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问题 OK, the question is fairly straightforward. I have a sandboxed OSX app. I want the user to be able to compile some C code (whatever he inputs). But whenever I'm attempting a call to: /usr/bin/env clang /the/path/to/the/source.c I'm getting the following error in the logs: xcrun: error: cannot be used within an App Sandbox. Is there any way to circumvent this? P.S. I've successfully done pretty much the same thing with Ruby, Python and PHP. 回答1: If you want to keep your app sandboxed you could

Getting App Store receipt for sandbox user fails with incorrect password message

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问题 I have a commercial macOS app I distribute in the Mac App Store. Now at startup I check for the App Store receipt and exit with code 173 if it is not present. This brings up the App Store sign in dialog in order to get a receipt. I have always tested this with sandbox accounts but now I only get errors when I try to sign in with a sandbox account (or my real Apple ID). The issue emerges when I start from XCode as well as when I export the app as a development build. I have the following setup

Rewriting Java native methods using ASM

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问题 I'm trying to do this by re-writing the bytecode of the class using ASM 4.0 to replace all the native methods with non- native stubs. So far I have this: class ClassAdapter extends ClassVisitor { public ClassAdapter(ClassVisitor cv) { super(Opcodes.ASM4, cv); } @Override public MethodVisitor visitMethod(int access, String base, String desc, String signature, String[] exceptions) { return cv.visitMethod(access & ~Opcodes.ACC_NATIVE, base, desc, signature, exceptions); } } which is executed by

Flash not work in iframe within sandbox attribute

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问题 I've used iframe to show some pages.These pages may contain an adobe flash content like a video. my problem is that the abode flash doesn't execute in an iframe within sandbox attribute. my iframe tag : <iframe sandbox="allow-popups allow-pointer-lock allow-same-origin allow-forms allow-scripts" src="http://example.com"></iframe> 回答1: Short answer: you can't execute flash plugin in a sandboxed iframe. The spec : http://www.w3.org/TR/html5/embedded-content-0.html#attr-iframe-sandbox Plugins

Flash not work in iframe within sandbox attribute

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