有没有办法伪造同步XHR请求？ [英] Is there a way to fake a synchronous XHR request?
问题描述
我使用的是Emscripten系统移植一堆C ++ code的为Javascript。 C ++的code有许多呼叫的fopen 这是一个同步IO调用。在Emscripten，我们模拟这种使用XHR请求本地资源的然而的，火狐同步XHR调用中（以的responseType 的一滴或 arraybuffer ）仅一个网络工作者中支持。转换所有的C ++ code，以适应异步IO code似乎很复杂，所以我第一次尝试，我想看看我是否可以伪造一个同步XHR请求。
I'm porting a pile of C++ code to Javascript using the Emscripten system. The C++ code has many calls to fopen which is a synchronous IO call. Within Emscripten, we simulate this using an XHR request to a local resource however, within Firefox synchronous XHR calls (with a responseType of blob or arraybuffer) are only supported within a Web-Worker. Converting all that c++ code to adapt to asynchronous IO code seems very complicated so for my first try, I'd like to see if I can fake a synchronous XHR request.
我最初的想法是，主回路可以用一个网络工作者这可能使同步IO调用和更新共享状态，而主循环暂停，等待完成网络工作者分享一些状态。免责声明：我知道这是不是典型的JavaScript的方式，但我端起同步code，而不是从头开始编写新的code（其中我肯定会使用了异步IO）
My initial thought was that the main loop could share some state with a web-worker which could make the synchronous io call and update the shared state while the main loop paused and waited for the web-worker finished. DISCLAIMER: I know this is not the typical Javascript way but I am porting synchronous code, not writing new code from scratch (in which I would definitely have used asynchronous IO).
鉴于网络工作者和主回路之间共享状态的限制，这个想法看起来是站不住脚的。
Given the restrictions on sharing state between a web-worker and the main-loop, this idea looks untenable.
还有没有其他的方法可以做到这一点？
Are there other ways to do this?
推荐答案
所以，看到所有的答案，做一些我自己的阅读后，它出现在最好的答案是：你可以，但仅限于文本数据，你必须将其转换回二进制数据。这是缓慢的，但没有工作。
So after seeing all the answers and doing some of my own reading, it appears the best answer is: "You can, but only for text data and you have to convert it back to binary data". This is slow, but does work.
<一个href=\"https://developer.mozilla.org/en-US/docs/Web/API/XMLHtt$p$pquest/Sending_and_Receiving_Binary_Data?redirectlocale=en-US&redirectslug=DOM%2FXMLHtt$p$pquest%2FSending_and_Receiving_Binary_Data#Receiving_binary_data_in_older_browsers\" rel=\"nofollow\">https://developer.mozilla.org/en-US/docs/Web/API/XMLHtt$p$pquest/Sending_and_Receiving_Binary_Data?redirectlocale=en-US&redirectslug=DOM%2FXMLHtt$p$pquest%2FSending_and_Receiving_Binary_Data#Receiving_binary_data_in_older_browsers
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