小弟今天学习webassmbly
遇到了这样一件事情。
我在把我 弄好 的wasm
模块文件上传到七牛云,再在本地通过fetch
来获取这个wasm
模块文件进行使用的时候,总是报告编译错误,如下
CompileError: WasmCompile: Compiling WASM function #32 failed:: return[0] expected type i32, found f32.load of type f32 @+3
后来通过断点发现是fetch
下来的wasm
模块文件有问题,内部的二进制编码变乱了,而且添加了额外的内容,甚至大小从原本的147byte
,变成了19Kb
。
// 环境检测
var root = this,
isBrowserSide = false;
if (typeof window !== "undefined" && root === window) {
isBrowserSide = true;
}
// 获取 wasm 并且导入
function fetchAndInstantiateWasm(url, imports) {
return fetch(url) // url could be your .wasm file
.then(res => {
if (res.ok) {
if (this.isBrowserSide) return res.arrayBuffer();
else return res.buffer();
}
throw new Error(`Unable to fetch Web Assembly file ${url}.`);
})
.then(bytes => {
// --- 测试用 START ---
console.log(bytes) // 在此打印出加载的文件的 bytes 信息
// 当使用本地文件时 // `bytes`为长度为 147 的二进制数组,并且顺利执行程序。
// 而使用上传文件时 // `bytes`为长度为 18670 的二进制数组,并且在下一步`WebAssembly.compile(bytes)`报错,
// --- 测试用 END ---
return WebAssembly.compile(bytes);
})
.then(module => WebAssembly.instantiate(module, imports || {}))
.then(instance => instance.exports);
}
// 调用函数
fetchAndInstantiateWasm("http://osgc6x3up.bkt.clouddn.com/test.wasm")
.then(ex => {
console.log(ex.add(1, 2))
});
本地文件 test.wasm(147 byte)
00000000: 00 61 73 6d 01 00 00 00 01 0a 02 60 00 00 60 02 .asm.......`..`.
00000010: 7f 7f 01 7f 03 03 02 00 01 05 03 01 00 01 06 0b ................
00000020: 02 7f 01 41 00 0b 7f 01 41 00 0b 07 10 02 03 61 ...A....A......a
00000030: 64 64 00 01 06 6d 65 6d 6f 72 79 02 00 08 01 00 dd...memory.....
00000040: 0a 11 02 06 00 23 00 24 01 0b 08 00 20 00 20 01 .....#.$........
00000050: 6a 0f 0b 0b 0e 01 00 41 08 0b 08 00 00 00 00 00 j......A........
00000060: 00 00 00 00 2e 04 6e 61 6d 65 01 1a 02 00 12 5f ......name....._
00000070: 5f 57 41 53 4d 5f 49 4e 49 54 49 41 4c 49 5a 45 _WASM_INITIALIZE
00000080: 52 01 03 61 64 64 02 0b 02 00 00 01 02 00 01 61 R..add.........a
00000090: 01 01 62 ......
...
...
Total 18670 Byte
通过浏览器下载的文件 test.wasm(有省略) (19kb)
00000000: 00 61 73 6d 01 00 00 00 01 3d 0a 60 03 7f 7f 7f .asm.....=.`....
00000010: 01 7f 60 02 7f 7f 01 7f 60 01 7f 01 7f 60 02 7f ..`.....`....`..
00000020: 7f 00 60 04 7f 7f 7f 7f 01 7f 60 05 7f 7f 7f 7f ..`.......`.....
00000030: 7f 01 7f 60 03 7f 7f 7f 00 60 00 00 60 01 7f 00 ...`.....`..`...
00000040: 60 03 7d 7d 7d 01 7f 03 26 25 00 00 00 01 00 01 `.}}}...&%......
00000050: 02 01 03 00 00 00 00 00 04 05 04 00 01 02 02 02 ................
00000060: 01 02 01 02 06 07 02 08 09 01 02 02 09 01 08 05 ................
00000070: 03 01 00 01 06 0b 02 7f 01 41 00 0b 7f 01 41 00 .........A....A.
00000080: 0b 07 97 04 1f 06 6d 65 6d 6f 72 79 02 00 06 6d ......memory...m
00000090: 65 6d 63 6d 70 00 00 06 6d 65 6d 63 70 79 00 01 emcmp...memcpy..
000000a0: 06 6d 65 6d 73 65 74 00 02 0d 63 72 65 61 74 65 .memset...create
000000b0: 5f 6d 73 70 61 63 65 00 03 17 63 72 65 61 74 65 _mspace...create
000000c0: 5f 6d 73 70 61 63 65 5f 77 69 74 68 5f 62 61 73 _mspace_with_bas
000000d0: 65 00 04 19 6d 73 70 61 63 65 5f 74 72 61 63 6b e...mspace_track
000000e0: 5f 6c 61 72 67 65 5f 63 68 75 6e 6b 73 00 05 0e _large_chunks...
000000f0: 64 65 73 74 72 6f 79 5f 6d 73 70 61 63 65 00 06 destroy_mspace..
00000100: 0d 6d 73 70 61 63 65 5f 6d 61 6c 6c 6f 63 00 07 .mspace_malloc..
00000110: 0b 6d 73 70 61 63 65 5f 66 72 65 65 00 08 0d 6d .mspace_free...m
00000120: 73 70 61 63 65 5f 63 61 6c 6c 6f 63 00 09 0e 6d space_calloc...m
00000130: 73 70 61 63 65 5f 72 65 61 6c 6c 6f 63 00 0a 17 space_realloc...
00000140: 6d 73 70 61 63 65 5f 72 65 61 6c 6c 6f 63 5f 69 mspace_realloc_i
00000150: 6e 5f 70 6c 61 63 65 00 0c 0f 6d 73 70 61 63 65 n_place...mspace
00000160: 5f 6d 65 6d 61 6c 69 67 6e 00 0d 19 6d 73 70 61 _memalign...mspa
00000170: 63 65 5f 69 6e 64 65 70 65 6e 64 65 6e 74 5f 63 ce_independent_c
00000180: 61 6c 6c 6f 63
不,并没有十年后,但也是费劲了小弟的一番努力才在写到这的时候,我突然有了头绪。
因为一直都是上传同一个名字的本地文件test.wasm
,覆盖的也是七牛云空间上的test.wasm
,而正巧之前第一次传入的是一个没有弄好的 19kb 的test.wasm
,也就因此造成了这个问题。
简单来说——没有覆盖成功。于是小弟以新的文件名再此上传试了试,竟然就成功了!
小弟确实按照文档来进行了覆盖上传的操作了啊。
// ...other things above...
var overwrite = true;
let options = {};
if (overwrite) {
options.scope = bucket + ":" + fileName
} else {
options.scope = bucket
}
var putPolicy = new qiniu.rs.PutPolicy(options);
// ...other things following...
而且在七牛云的工作台上,文件的时间和大小在进行覆盖上传之后也都发生了变化。
就很气
在后来的测试中,发现还是无法覆盖上传成功。
就算在控制台中下载文件能够下载到新上传的文件
但是通过外链下载的文件仍然是第一次上传的文件
就如下图所示
BTW,已交工单。
1
mkeith 2017-07-03 04:11:19 +08:00 via iPhone 1
CDN 没更新?
|
3
whiteball OP ```
116.24.235.38 MISS 186 [02/Jul/2017:16:18:32 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19676 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 MISS 140 [02/Jul/2017:16:18:52 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19680 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 MISS 83 [02/Jul/2017:16:18:53 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19635 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 57 [02/Jul/2017:16:58:41 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19680 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 MISS 210 [02/Jul/2017:16:18:32 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19715 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 MISS 283 [02/Jul/2017:16:18:20 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm?imageView2/2/w/308/h/210/interlace/1/q/100 HTTP/1.1" 400 936 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 HIT 4 [02/Jul/2017:16:57:49 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19684 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 20 [02/Jul/2017:16:56:52 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19650 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 MISS 295 [02/Jul/2017:16:18:19 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm?imageView2/2/w/308/h/210/interlace/1/q/100 HTTP/1.1" 400 973 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 HIT 15 [02/Jul/2017:16:58:42 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19611 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 MISS 162 [02/Jul/2017:17:06:06 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm?imageView2/2/w/308/h/210/interlace/1/q/100 HTTP/1.1" 400 909 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 MISS 183 [02/Jul/2017:17:06:16 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm?imageView2/2/w/308/h/210/interlace/1/q/100 HTTP/1.1" 400 888 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 HIT 11 [02/Jul/2017:17:33:52 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19684 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 0 [02/Jul/2017:17:06:19 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 206 19150 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 HIT 7 [02/Jul/2017:17:23:04 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19684 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 MISS 150 [02/Jul/2017:17:16:36 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wast HTTP/1.1" 200 1602 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 MISS 189 [02/Jul/2017:17:16:36 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wast HTTP/1.1" 200 1647 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 HIT 55 [02/Jul/2017:17:08:05 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19652 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 MISS 145 [02/Jul/2017:17:06:16 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm?imageView2/2/w/308/h/210/interlace/1/q/100 HTTP/1.1" 400 844 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 HIT 51 [02/Jul/2017:17:09:01 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19722 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 62 [02/Jul/2017:17:05:01 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19650 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 0 [02/Jul/2017:17:06:19 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 206 1026 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" 116.24.235.38 HIT 130 [02/Jul/2017:17:08:05 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19721 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 0 [02/Jul/2017:17:05:53 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19684 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 0 [02/Jul/2017:17:14:13 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19650 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 49 [02/Jul/2017:17:15:32 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19652 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 41 [02/Jul/2017:17:06:54 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19638 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 0 [02/Jul/2017:17:09:01 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19652 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 72 [02/Jul/2017:17:15:31 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19723 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 13 [02/Jul/2017:17:11:52 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19650 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 HIT 21 [02/Jul/2017:17:32:43 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm HTTP/1.1" 200 19682 "-" "node-fetch/1.0+(+https://github.com/bitinn/node-fetch)" 116.24.235.38 MISS 237 [02/Jul/2017:17:06:06 +0800] "GET http://osgc6x3up.bkt.clouddn.com/test.wasm?imageView2/2/w/308/h/210/interlace/1/q/100 HTTP/1.1" 400 953 "-" "Mozilla/5.0+(Macintosh;+Intel+Mac+OS+X+10_12_1)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/59.0.3071.115+Safari/537.36" ``` CDN 的日志 |
4
ovear 2017-07-03 04:22:12 +08:00 via Android 1
在后台刷新缓存
|
5
whiteball OP @ovear
不是很懂,是这样么...不过弄完还是不行诶。 ![是不是回复里面就不能用图片了=。=]( http://7xp7u3.com1.z0.glb.clouddn.com/o_1bk2frlg91mu41bsg1ge0gvv1sr7f.png) |
6
libook 2017-07-03 09:23:18 +08:00 via Android 1
Cdn 存在的意义之一 , 就是能让任何地区的任何量级的用户 都能流畅地访问到资源, 所以 cdn 在很多地区都会有大量的分布式节点服务器。覆盖老文件,cdn 需要同步这些节点, 受限于速度、成本和任务量等因素,cdn 通常难以做到及时更新。七牛官方的建议是尽可能不修改已经上传的文件,但如果一定要修改,就要等待七牛每七日一次的节点同步,或者手动去七牛后台刷新,刷新文件数量和频率都是有限制的。所以 cdn 的最佳实践是,修改文件要同时修改文件名(如 abc-1.0.bin ),以新文件的形式上传 cdn,客户端动态从应用服务器上获取最新的 url,访问七牛 cdn 上的最新上传的文件。
另外七牛上也可以配置客户端缓存的时长,如果是浏览器或任何严格遵循 http 标准的客户端都会按照数据头的缓存时常进行本地缓存。 |
7
xmadi 2017-07-03 09:50:47 +08:00 via iPhone 1
cdn 就是这样的 缓存很多 每次上传改名字吧
|
10
indooorsman 2017-07-03 11:45:53 +08:00 via Android 1
看到标题第一反应就是没刷新 cdn 缓存…
七牛提供刷新缓存的接口,也有 web 界面可以刷新的 每次上传改名是个好主意 |
11
whiteball OP @indooorsman
老司机就是有经验啊。 =,=突然感觉有点丢人...果然这锅还是得自己来背。 文档写得也挺清楚的: https://developer.qiniu.com/fusion/kb/1325/refresh-the-cache-and-the-effect-of-time |
12
codingkiller 2017-07-03 12:05:55 +08:00
CDN,基本功。
|
13
anyele 2017-07-03 12:12:01 +08:00 via Android
十年后
|
14
SourceMan 2017-07-03 12:32:02 +08:00 via iPhone
哈哈哈,缓存问题
|
15
ty89 2017-07-03 13:38:05 +08:00
废话写了一大堆
所以楼主你 http 的基础知识是看 a 片学的吗 10 年后: 《震惊!修改了 css 文件后显示效果竟然没有丝毫变化,原因让所有人不瞪口呆...》 |
16
mingyun 2017-07-03 22:51:57 +08:00
已解决 v2 可编辑了?
|