mirror of
https://github.com/jart/cosmopolitan.git
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106 lines
4.2 KiB
C
106 lines
4.2 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/bits/safemacros.internal.h"
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#include "libc/dns/dns.h"
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#include "libc/fmt/conv.h"
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#include "libc/fmt/fmt.h"
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#include "libc/log/check.h"
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#include "libc/log/log.h"
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#include "libc/macros.internal.h"
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#include "libc/runtime/gc.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sock/sock.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/af.h"
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#include "libc/sysv/consts/ai.h"
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#include "libc/sysv/consts/ipproto.h"
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#include "libc/sysv/consts/shut.h"
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#include "libc/sysv/consts/sock.h"
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#include "libc/x/x.h"
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#include "net/http/uri.h"
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/**
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* @fileoverview Downloads HTTP URL to stdout.
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*
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* make -j8 o//examples/curl.com
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* o//examples/curl.com http://justine.lol/ape.html
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*/
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int main(int argc, char *argv[]) {
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int sock;
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ssize_t rc;
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unsigned long need;
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struct UriSlice path;
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size_t i, got, toto, msglen;
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char buf[1500], host[256], port[7];
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const char *url, *msg, *pathstr, *crlfcrlf, *contentlength;
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struct UriSlice us[16];
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struct Uri u = {.segs.p = us, .segs.n = ARRAYLEN(us)};
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struct addrinfo *addr, *addrs;
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struct addrinfo hints = {.ai_family = AF_INET,
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.ai_socktype = SOCK_STREAM,
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.ai_protocol = IPPROTO_TCP,
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.ai_flags = AI_NUMERICSERV};
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if (argc != 2) {
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fprintf(stderr, "USAGE: %s URL\n", argv[0]);
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exit(1);
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}
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url = argv[1];
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CHECK_NE(-1, uriparse(&u, url, strlen(url)), "BAD URL: %`'s", url);
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CHECK_EQ(kUriSchemeHttp, urischeme(u.scheme, url));
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urislice2cstr(host, sizeof(host), u.host, url, "127.0.0.1");
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urislice2cstr(port, sizeof(port), u.port, url, "80");
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path = uripath(&u);
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pathstr = path.n ? url + path.i : "/";
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msg = _gc(xstrcat("GET ", pathstr,
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" HTTP/1.1\r\n"
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"Host: ",
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host,
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"\r\n"
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"Connection: close\r\n"
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"Content-Length: 0\r\n"
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"Accept: text/plain; */*\r\n"
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"Accept-Encoding: identity\r\n"
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"User-Agent: github.com/jart/cosmopolitan\r\n"
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"\r\n"));
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msglen = strlen(msg);
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CHECK_EQ(EAI_SUCCESS, getaddrinfo(host, port, &hints, &addrs));
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for (addr = addrs; addr; addr = addr->ai_next) {
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CHECK_NE(-1, (sock = socket(addr->ai_family, addr->ai_socktype,
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addr->ai_protocol)));
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CHECK_NE(-1, connect(sock, addr->ai_addr, addr->ai_addrlen));
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CHECK_EQ(msglen, write(sock, msg, msglen));
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shutdown(sock, SHUT_WR);
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buf[0] = '\0';
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CHECK_NE(-1, (rc = read(sock, buf, sizeof(buf))));
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got = rc;
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CHECK(startswith(buf, "HTTP/1.1 200"), "%`'.*s", got, buf);
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CHECK_NOTNULL((crlfcrlf = memmem(buf, got, "\r\n\r\n", 4)));
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need = strtol((char *)firstnonnull(
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memmem(buf, crlfcrlf - buf, "\r\nContent-Length: ", 18),
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firstnonnull(memmem(buf, crlfcrlf - buf,
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"\r\ncontent-length: ", 18),
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"\r\nContent-Length: -1")) +
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18,
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NULL, 10);
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got = MIN(got - (crlfcrlf + 4 - buf), need);
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CHECK_EQ(got, write(1, crlfcrlf + 4, got));
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for (toto = got; toto < need; toto += got) {
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CHECK_NE(-1, (rc = read(sock, buf, sizeof(buf))));
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if (!(got = rc)) exit(18);
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got = MIN(got, need - toto);
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CHECK_EQ(got, write(1, buf, got));
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}
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close(sock);
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break;
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}
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return 0;
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}
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