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Swoole 4.4：支持 CURL 協程化

RobinTang / 1719人閱讀

摘要：在之前的版本中，一直不支持協程化，在代碼中無法使用。由于使用了庫實現，無法直接它的，版本使用模擬實現了的，并在底層替換了等函數的。跟蹤使用跟蹤發現，所有系統調用均變成的異步非阻塞調用了。

在4.4之前的版本中，Swoole一直不支持CURL協程化，在代碼中無法使用curl。由于curl使用了libcurl庫實現，無法直接hook它的socket，4.4版本使用SwooleCoroutineHttpClient模擬實現了curl的API，并在底層替換了curl_init等函數的C Handler。

提示

CURL Hook的特性尚處于試驗階段，請勿在生產環境中直接使用

暫不支持文件上傳、CURL Multi

仍然需要依賴curl，請務必安裝curl擴展

支持的特性列表

GET/POST

Header

Cookie

Https

經過驗證Guzzle CURL完全可以使用
開啟

使用Runtime::enableCoroutine來開啟CURL Hook。

默認不開啟CURL Hook

SwooleRuntime::enableCoroutine(SWOOLE_HOOK_ALL);
SwooleRuntime::enableCoroutine(SWOOLE_HOOK_CURL);
使用 
$n = 10;
while($n--) {
    go(function () {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, "http://www.xinhuanet.com/");
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        $output = curl_exec($ch);
        if ($output === FALSE) {
            echo "CURL Error:" . curl_error($ch);
        }
        curl_close($ch);
        echo strlen($output) . " bytes
";
    });
}
要將上面兩段代碼合并到一個文件中執行
運行結果 
htf@LAPTOP-0K15EFQI:~/swoole-src/examples$ time php curl.php
177173 bytes
177173 bytes
177173 bytes
177173 bytes
177173 bytes
177173 bytes
177173 bytes
177173 bytes
177173 bytes
177173 bytes

real    0m0.534s
user    0m0.031s
sys     0m0.297s

可以看到整個程序是并行的，進程沒有任何阻塞。

strace 跟蹤

使用strace跟蹤發現，所有系統調用均變成epoll+socket的異步非阻塞調用了。

epoll_create(512)                       = 3
mmap(NULL, 258048, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc038a50000
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc028910000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 4
fcntl(4, F_GETFL)                       = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0
pipe([5, 6])                            = 0
fcntl(5, F_GETFL)                       = 0 (flags O_RDONLY)
fcntl(5, F_SETFL, O_RDONLY|O_NONBLOCK)  = 0
fcntl(6, F_GETFL)                       = 0x1 (flags O_WRONLY)
fcntl(6, F_SETFL, O_WRONLY|O_NONBLOCK)  = 0
epoll_ctl(3, EPOLL_CTL_ADD, 5, {EPOLLIN, {u32=5, u64=34359738373}}) = 0
mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fc028100000
mprotect(0x7fc028101000, 8388608, PROT_READ|PROT_WRITE) = 0
clone(child_stack=0x7fc0288ffb70, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fc0289009d0, tls=0x7fc028900700, child_tidptr=0x7fc0289009d0) = 55
mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fc0237f0000
mprotect(0x7fc0237f1000, 8388608, PROT_READ|PROT_WRITE) = 0
clone(child_stack=0x7fc023fefb70, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fc023ff09d0, tls=0x7fc023ff0700, child_tidptr=0x7fc023ff09d0) = 56
mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fc022fe0000
mprotect(0x7fc022fe1000, 8388608, PROT_READ|PROT_WRITE) = 0
clone(child_stack=0x7fc0237dfb70, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fc0237e09d0, tls=0x7fc0237e0700, child_tidptr=0x7fc0237e09d0) = 57
mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fc0227d0000
mprotect(0x7fc0227d1000, 8388608, PROT_READ|PROT_WRITE) = 0
clone(child_stack=0x7fc022fcfb70, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fc022fd09d0, tls=0x7fc022fd0700, child_tidptr=0x7fc022fd09d0) = 58
futex(0x7fffd9e01ce0, FUTEX_WAKE_PRIVATE, 1) = 1
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=513190000}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=513408000}) = 0
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc0225c0000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 8
fcntl(8, F_GETFL)                       = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(8, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(8, SOL_TCP, TCP_NODELAY, [1], 4) = 0
futex(0x7fffd9e01ce0, FUTEX_WAKE_PRIVATE, 1) = 1
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=514359000}) = 0
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc0223b0000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 10
fcntl(10, F_GETFL)                      = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(10, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(10, SOL_TCP, TCP_NODELAY, [1], 4) = 0
futex(0x7fffd9e01ce0, FUTEX_WAKE_PRIVATE, 1) = 1
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=515961000}) = 0
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc0221a0000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 9
fcntl(9, F_GETFL)                       = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(9, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(9, SOL_TCP, TCP_NODELAY, [1], 4) = 0
futex(0x7fffd9e01ce4, FUTEX_WAKE_PRIVATE, 1) = 1
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=517822000}) = 0
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc021f90000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 7
fcntl(7, F_GETFL)                       = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(7, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(7, SOL_TCP, TCP_NODELAY, [1], 4) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=520138000}) = 0
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc021b60000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 11
fcntl(11, F_GETFL)                      = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(11, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(11, SOL_TCP, TCP_NODELAY, [1], 4) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=521400000}) = 0
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc021950000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 12
fcntl(12, F_GETFL)                      = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(12, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(12, SOL_TCP, TCP_NODELAY, [1], 4) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=523446000}) = 0
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc021530000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 17
fcntl(17, F_GETFL)                      = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(17, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(17, SOL_TCP, TCP_NODELAY, [1], 4) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=524631000}) = 0
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc021320000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 18
fcntl(18, F_GETFL)                      = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(18, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(18, SOL_TCP, TCP_NODELAY, [1], 4) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=525903000}) = 0
mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc021110000
socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC, IPPROTO_IP) = 19
fcntl(19, F_GETFL)                      = 0x80002 (flags O_RDWR|O_CLOEXEC)
fcntl(19, F_SETFL, O_RDWR|O_NONBLOCK|O_CLOEXEC) = 0
setsockopt(19, SOL_TCP, TCP_NODELAY, [1], 4) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=232, tv_nsec=527295000}) = 0
epoll_wait(3, [{EPOLLIN, {u32=5, u64=34359738373}}], 4096, 1000) = 1
read(5, "0T340331377177