Created
November 19, 2017 04:30
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GolangでHTTP/1.1のチャンク受信
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package main | |
import ( | |
"net" | |
"net/http" | |
"time" | |
"bufio" | |
"io" | |
"strconv" | |
"log" | |
) | |
func main() { | |
// TCPソケットオープン | |
dialer := &net.Dialer{ | |
Timeout: 30 * time.Second, | |
KeepAlive: 30 * time.Second, | |
} | |
conn, err := dialer.Dial("tcp", "localhost:8080") | |
if err != nil { | |
panic(err) | |
} | |
defer conn.Close() | |
// コネクションを通してリクエストの送信 | |
request, err := http.NewRequest("GET", "http://localhost:8080/chunked", nil) | |
err = request.Write(conn) | |
if err != nil { | |
panic(err) | |
} | |
// コネクションからリーダーを作成 | |
reader := bufio.NewReader(conn) | |
// ヘッダの読み込み | |
resp, err := http.ReadResponse(reader, request) | |
if err != nil { | |
panic(err) | |
} | |
if resp.TransferEncoding[0] != "chunked" { | |
panic("wront transfer encoding") | |
} | |
for { | |
// サイズを取得 | |
sizeStr, err := reader.ReadBytes('\n') | |
if err == io.EOF { | |
break | |
} | |
// 16進数のサイズをパース。サイズが0ならクローズ | |
// HTTPではボディ要素以外の行末印をCRLFとして扱っているため、その分は読み込まない。 | |
size, err := strconv.ParseInt(string(sizeStr[:len(sizeStr)-2]), 16, 64) | |
if size == 0 { | |
break | |
} | |
if err != nil { | |
panic(err) | |
} | |
// サイズ数分バッファを確保して読み込み | |
line := make([]byte, int(size)) | |
reader.Read(line) | |
reader.Discard(2) | |
log.Println(" ", string(line)) | |
} | |
} |
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