它處理 http PUT 請求。對于小文件，它工作正常：$ curl? -v http://192.168.1.10:9193/ -T red.tx*? ?Trying 192.168.1.10...* Connected to 192.168.1.10 (192.168.1.10) port 9193 (#0)> PUT /red.tx HTTP/1.1> Host: 192.168.1.10:9193> User-Agent: curl/7.47.0> Accept: */*> Content-Length: 19697247> Expect: 100-continue>< HTTP/1.1 100 Continue* We are completely uploaded and fine< HTTP/1.1 200 OK< Date: Fri, 26 Jul 2019 00:43:43 GMT< Content-Length: 0< Content-Type: text/plain; charset=utf-8<* Connection #0 to host 192.168.1.10 left intact然而 - 發(fā)送一個大于 1G 的大文件，它會耗盡內(nèi)存。這是可以理解的，因為整個正文被讀作contents, err := ioutil.ReadAll(r.Body)runtime: out of memory: cannot allocate 536870912-byte block (537919488 in use)fatal error: out of memory? ??runtime stack:runtime.throw(0x259a35, 0xd)? ? ? ? /usr/lib/go-1.7/src/runtime/panic.go:566 +0x78runtime.largeAlloc(0x1ffffe00, 0x10616f01, 0x10637afc)? ? ? ? /usr/lib/go-1.7/src/runtime/malloc.go:776 +0xc8runtime.mallocgc.func1()? ? ? ? /usr/lib/go-1.7/src/runtime/malloc.go:669 +0x34runtime.systemstack(0x10aa8200)? ? ? ? /usr/lib/go-1.7/src/runtime/asm_arm.s:247 +0x80runtime.mstart()? ? ? ? /usr/lib/go-1.7/src/runtime/proc.go:1079請告訴我從 r.Body 讀取并將其寫入文件的正確方法。謝謝！
1 回答
倚天杖
TA貢獻1828條經(jīng)驗 獲得超3個贊
嘗試將請求負載直接復制到文件中。
f, err := os.Create(temporaryFilename)
if err != nil {
return err
}
defer f.Close()
_, err := io.Copy(f, r.Body)
如果您需要對復制的文件執(zhí)行某些操作，只需操作創(chuàng)建的文件對象（在上面的示例中是f）。
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