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Diffstat (limited to '')
| -rw-r--r-- | web/server/h2o/libh2o/deps/klib/knetfile.c | 628 |
1 files changed, 628 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/deps/klib/knetfile.c b/web/server/h2o/libh2o/deps/klib/knetfile.c new file mode 100644 index 00000000..158add91 --- /dev/null +++ b/web/server/h2o/libh2o/deps/klib/knetfile.c @@ -0,0 +1,628 @@ +/* The MIT License + + Copyright (c) 2008 by Genome Research Ltd (GRL). + 2010 by Attractive Chaos <attractor@live.co.uk> + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + SOFTWARE. +*/ + +/* Probably I will not do socket programming in the next few years and + therefore I decide to heavily annotate this file, for Linux and + Windows as well. -ac */ + +#include <time.h> +#include <stdio.h> +#include <ctype.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <unistd.h> +#include <sys/types.h> + +#ifndef _WIN32 +#include <netdb.h> +#include <arpa/inet.h> +#include <sys/socket.h> +#endif + +#include "knetfile.h" + +/* In winsock.h, the type of a socket is SOCKET, which is: "typedef + * u_int SOCKET". An invalid SOCKET is: "(SOCKET)(~0)", or signed + * integer -1. In knetfile.c, I use "int" for socket type + * throughout. This should be improved to avoid confusion. + * + * In Linux/Mac, recv() and read() do almost the same thing. You can see + * in the header file that netread() is simply an alias of read(). In + * Windows, however, they are different and using recv() is mandatory. + */ + +/* This function tests if the file handler is ready for reading (or + * writing if is_read==0). */ +static int socket_wait(int fd, int is_read) +{ + fd_set fds, *fdr = 0, *fdw = 0; + struct timeval tv; + int ret; + tv.tv_sec = 5; tv.tv_usec = 0; // 5 seconds time out + FD_ZERO(&fds); + FD_SET(fd, &fds); + if (is_read) fdr = &fds; + else fdw = &fds; + ret = select(fd+1, fdr, fdw, 0, &tv); +#ifndef _WIN32 + if (ret == -1) perror("select"); +#else + if (ret == 0) + fprintf(stderr, "select time-out\n"); + else if (ret == SOCKET_ERROR) + fprintf(stderr, "select: %d\n", WSAGetLastError()); +#endif + return ret; +} + +#ifndef _WIN32 +/* This function does not work with Windows due to the lack of + * getaddrinfo() in winsock. It is addapted from an example in "Beej's + * Guide to Network Programming" (http://beej.us/guide/bgnet/). */ +static int socket_connect(const char *host, const char *port) +{ +#define __err_connect(func) do { perror(func); freeaddrinfo(res); return -1; } while (0) + + int on = 1, fd; + struct linger lng = { 0, 0 }; + struct addrinfo hints, *res = 0; + memset(&hints, 0, sizeof(struct addrinfo)); + hints.ai_family = AF_UNSPEC; + hints.ai_socktype = SOCK_STREAM; + /* In Unix/Mac, getaddrinfo() is the most convenient way to get + * server information. */ + if (getaddrinfo(host, port, &hints, &res) != 0) __err_connect("getaddrinfo"); + if ((fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1) __err_connect("socket"); + /* The following two setsockopt() are used by ftplib + * (http://nbpfaus.net/~pfau/ftplib/). I am not sure if they + * necessary. */ + if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) __err_connect("setsockopt"); + if (setsockopt(fd, SOL_SOCKET, SO_LINGER, &lng, sizeof(lng)) == -1) __err_connect("setsockopt"); + if (connect(fd, res->ai_addr, res->ai_addrlen) != 0) __err_connect("connect"); + freeaddrinfo(res); + return fd; +} +#else +/* MinGW's printf has problem with "%lld" */ +char *int64tostr(char *buf, int64_t x) +{ + int cnt; + int i = 0; + do { + buf[i++] = '0' + x % 10; + x /= 10; + } while (x); + buf[i] = 0; + for (cnt = i, i = 0; i < cnt/2; ++i) { + int c = buf[i]; buf[i] = buf[cnt-i-1]; buf[cnt-i-1] = c; + } + return buf; +} + +int64_t strtoint64(const char *buf) +{ + int64_t x; + for (x = 0; *buf != '\0'; ++buf) + x = x * 10 + ((int64_t) *buf - 48); + return x; +} +/* In windows, the first thing is to establish the TCP connection. */ +int knet_win32_init() +{ + WSADATA wsaData; + return WSAStartup(MAKEWORD(2, 2), &wsaData); +} +void knet_win32_destroy() +{ + WSACleanup(); +} +/* A slightly modfied version of the following function also works on + * Mac (and presummably Linux). However, this function is not stable on + * my Mac. It sometimes works fine but sometimes does not. Therefore for + * non-Windows OS, I do not use this one. */ +static SOCKET socket_connect(const char *host, const char *port) +{ +#define __err_connect(func) \ + do { \ + fprintf(stderr, "%s: %d\n", func, WSAGetLastError()); \ + return -1; \ + } while (0) + + int on = 1; + SOCKET fd; + struct linger lng = { 0, 0 }; + struct sockaddr_in server; + struct hostent *hp = 0; + // open socket + if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) __err_connect("socket"); + if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on)) == -1) __err_connect("setsockopt"); + if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char*)&lng, sizeof(lng)) == -1) __err_connect("setsockopt"); + // get host info + if (isalpha(host[0])) hp = gethostbyname(host); + else { + struct in_addr addr; + addr.s_addr = inet_addr(host); + hp = gethostbyaddr((char*)&addr, 4, AF_INET); + } + if (hp == 0) __err_connect("gethost"); + // connect + server.sin_addr.s_addr = *((unsigned long*)hp->h_addr); + server.sin_family= AF_INET; + server.sin_port = htons(atoi(port)); + if (connect(fd, (struct sockaddr*)&server, sizeof(server)) != 0) __err_connect("connect"); + // freehostent(hp); // strangely in MSDN, hp is NOT freed (memory leak?!) + return fd; +} +#endif + +static off_t my_netread(int fd, void *buf, off_t len) +{ + off_t rest = len, curr, l = 0; + /* recv() and read() may not read the required length of data with + * one call. They have to be called repeatedly. */ + while (rest) { + if (socket_wait(fd, 1) <= 0) break; // socket is not ready for reading + curr = netread(fd, buf + l, rest); + /* According to the glibc manual, section 13.2, a zero returned + * value indicates end-of-file (EOF), which should mean that + * read() will not return zero if EOF has not been met but data + * are not immediately available. */ + if (curr == 0) break; + l += curr; rest -= curr; + } + return l; +} + +/************************* + * FTP specific routines * + *************************/ + +static int kftp_get_response(knetFile *ftp) +{ +#ifndef _WIN32 + unsigned char c; +#else + char c; +#endif + int n = 0; + char *p; + if (socket_wait(ftp->ctrl_fd, 1) <= 0) return 0; + while (netread(ftp->ctrl_fd, &c, 1)) { // FIXME: this is *VERY BAD* for unbuffered I/O + //fputc(c, stderr); + if (n >= ftp->max_response) { + ftp->max_response = ftp->max_response? ftp->max_response<<1 : 256; + ftp->response = (char*)realloc(ftp->response, ftp->max_response); + } + ftp->response[n++] = c; + if (c == '\n') { + if (n >= 4 && isdigit(ftp->response[0]) && isdigit(ftp->response[1]) && isdigit(ftp->response[2]) + && ftp->response[3] != '-') break; + n = 0; + continue; + } + } + if (n < 2) return -1; + ftp->response[n-2] = 0; + return strtol(ftp->response, &p, 0); +} + +static int kftp_send_cmd(knetFile *ftp, const char *cmd, int is_get) +{ + if (socket_wait(ftp->ctrl_fd, 0) <= 0) return -1; // socket is not ready for writing + netwrite(ftp->ctrl_fd, cmd, strlen(cmd)); + return is_get? kftp_get_response(ftp) : 0; +} + +static int kftp_pasv_prep(knetFile *ftp) +{ + char *p; + int v[6]; + kftp_send_cmd(ftp, "PASV\r\n", 1); + for (p = ftp->response; *p && *p != '('; ++p); + if (*p != '(') return -1; + ++p; + sscanf(p, "%d,%d,%d,%d,%d,%d", &v[0], &v[1], &v[2], &v[3], &v[4], &v[5]); + memcpy(ftp->pasv_ip, v, 4 * sizeof(int)); + ftp->pasv_port = (v[4]<<8&0xff00) + v[5]; + return 0; +} + + +static int kftp_pasv_connect(knetFile *ftp) +{ + char host[80], port[10]; + if (ftp->pasv_port == 0) { + fprintf(stderr, "[kftp_pasv_connect] kftp_pasv_prep() is not called before hand.\n"); + return -1; + } + sprintf(host, "%d.%d.%d.%d", ftp->pasv_ip[0], ftp->pasv_ip[1], ftp->pasv_ip[2], ftp->pasv_ip[3]); + sprintf(port, "%d", ftp->pasv_port); + ftp->fd = socket_connect(host, port); + if (ftp->fd == -1) return -1; + return 0; +} + +int kftp_connect(knetFile *ftp) +{ + ftp->ctrl_fd = socket_connect(ftp->host, ftp->port); + if (ftp->ctrl_fd == -1) return -1; + kftp_get_response(ftp); + kftp_send_cmd(ftp, "USER anonymous\r\n", 1); + kftp_send_cmd(ftp, "PASS kftp@\r\n", 1); + kftp_send_cmd(ftp, "TYPE I\r\n", 1); + return 0; +} + +int kftp_reconnect(knetFile *ftp) +{ + if (ftp->ctrl_fd != -1) { + netclose(ftp->ctrl_fd); + ftp->ctrl_fd = -1; + } + netclose(ftp->fd); + ftp->fd = -1; + return kftp_connect(ftp); +} + +// initialize ->type, ->host, ->retr and ->size +knetFile *kftp_parse_url(const char *fn, const char *mode) +{ + knetFile *fp; + char *p; + int l; + if (strstr(fn, "ftp://") != fn) return 0; + for (p = (char*)fn + 6; *p && *p != '/'; ++p); + if (*p != '/') return 0; + l = p - fn - 6; + fp = (knetFile*)calloc(1, sizeof(knetFile)); + fp->type = KNF_TYPE_FTP; + fp->fd = -1; + /* the Linux/Mac version of socket_connect() also recognizes a port + * like "ftp", but the Windows version does not. */ + fp->port = strdup("21"); + fp->host = (char*)calloc(l + 1, 1); + if (strchr(mode, 'c')) fp->no_reconnect = 1; + strncpy(fp->host, fn + 6, l); + fp->retr = (char*)calloc(strlen(p) + 8, 1); + sprintf(fp->retr, "RETR %s\r\n", p); + fp->size_cmd = (char*)calloc(strlen(p) + 8, 1); + sprintf(fp->size_cmd, "SIZE %s\r\n", p); + fp->seek_offset = 0; + return fp; +} +// place ->fd at offset off +int kftp_connect_file(knetFile *fp) +{ + int ret; + long long file_size; + if (fp->fd != -1) { + netclose(fp->fd); + if (fp->no_reconnect) kftp_get_response(fp); + } + kftp_pasv_prep(fp); + kftp_send_cmd(fp, fp->size_cmd, 1); +#ifndef _WIN32 + if ( sscanf(fp->response,"%*d %lld", &file_size) != 1 ) + { + fprintf(stderr,"[kftp_connect_file] %s\n", fp->response); + return -1; + } +#else + const char *p = fp->response; + while (*p != ' ') ++p; + while (*p < '0' || *p > '9') ++p; + file_size = strtoint64(p); +#endif + fp->file_size = file_size; + if (fp->offset>=0) { + char tmp[32]; +#ifndef _WIN32 + sprintf(tmp, "REST %lld\r\n", (long long)fp->offset); +#else + strcpy(tmp, "REST "); + int64tostr(tmp + 5, fp->offset); + strcat(tmp, "\r\n"); +#endif + kftp_send_cmd(fp, tmp, 1); + } + kftp_send_cmd(fp, fp->retr, 0); + kftp_pasv_connect(fp); + ret = kftp_get_response(fp); + if (ret != 150) { + fprintf(stderr, "[kftp_connect_file] %s\n", fp->response); + netclose(fp->fd); + fp->fd = -1; + return -1; + } + fp->is_ready = 1; + return 0; +} + + +/************************** + * HTTP specific routines * + **************************/ + +knetFile *khttp_parse_url(const char *fn, const char *mode) +{ + knetFile *fp; + char *p, *proxy, *q; + int l; + if (strstr(fn, "http://") != fn) return 0; + // set ->http_host + for (p = (char*)fn + 7; *p && *p != '/'; ++p); + l = p - fn - 7; + fp = (knetFile*)calloc(1, sizeof(knetFile)); + fp->http_host = (char*)calloc(l + 1, 1); + strncpy(fp->http_host, fn + 7, l); + fp->http_host[l] = 0; + for (q = fp->http_host; *q && *q != ':'; ++q); + if (*q == ':') *q++ = 0; + // get http_proxy + proxy = getenv("http_proxy"); + // set ->host, ->port and ->path + if (proxy == 0) { + fp->host = strdup(fp->http_host); // when there is no proxy, server name is identical to http_host name. + fp->port = strdup(*q? q : "80"); + fp->path = strdup(*p? p : "/"); + } else { + fp->host = (strstr(proxy, "http://") == proxy)? strdup(proxy + 7) : strdup(proxy); + for (q = fp->host; *q && *q != ':'; ++q); + if (*q == ':') *q++ = 0; + fp->port = strdup(*q? q : "80"); + fp->path = strdup(fn); + } + fp->type = KNF_TYPE_HTTP; + fp->ctrl_fd = fp->fd = -1; + fp->seek_offset = 0; + return fp; +} + +int khttp_connect_file(knetFile *fp) +{ + int ret, l = 0; + char *buf, *p; + if (fp->fd != -1) netclose(fp->fd); + fp->fd = socket_connect(fp->host, fp->port); + buf = (char*)calloc(0x10000, 1); // FIXME: I am lazy... But in principle, 64KB should be large enough. + l += sprintf(buf + l, "GET %s HTTP/1.0\r\nHost: %s\r\n", fp->path, fp->http_host); + l += sprintf(buf + l, "Range: bytes=%lld-\r\n", (long long)fp->offset); + l += sprintf(buf + l, "\r\n"); + netwrite(fp->fd, buf, l); + l = 0; + while (netread(fp->fd, buf + l, 1)) { // read HTTP header; FIXME: bad efficiency + if (buf[l] == '\n' && l >= 3) + if (strncmp(buf + l - 3, "\r\n\r\n", 4) == 0) break; + ++l; + } + buf[l] = 0; + if (l < 14) { // prematured header + netclose(fp->fd); + fp->fd = -1; + return -1; + } + ret = strtol(buf + 8, &p, 0); // HTTP return code + if (ret == 200 && fp->offset>0) { // 200 (complete result); then skip beginning of the file + off_t rest = fp->offset; + while (rest) { + off_t l = rest < 0x10000? rest : 0x10000; + rest -= my_netread(fp->fd, buf, l); + } + } else if (ret != 206 && ret != 200) { + free(buf); + fprintf(stderr, "[khttp_connect_file] fail to open file (HTTP code: %d).\n", ret); + netclose(fp->fd); + fp->fd = -1; + return -1; + } + free(buf); + fp->is_ready = 1; + return 0; +} + +/******************** + * Generic routines * + ********************/ + +knetFile *knet_open(const char *fn, const char *mode) +{ + knetFile *fp = 0; + if (mode[0] != 'r') { + fprintf(stderr, "[kftp_open] only mode \"r\" is supported.\n"); + return 0; + } + if (strstr(fn, "ftp://") == fn) { + fp = kftp_parse_url(fn, mode); + if (fp == 0) return 0; + if (kftp_connect(fp) == -1) { + knet_close(fp); + return 0; + } + kftp_connect_file(fp); + } else if (strstr(fn, "http://") == fn) { + fp = khttp_parse_url(fn, mode); + if (fp == 0) return 0; + khttp_connect_file(fp); + } else { // local file +#ifdef _WIN32 + /* In windows, O_BINARY is necessary. In Linux/Mac, O_BINARY may + * be undefined on some systems, although it is defined on my + * Mac and the Linux I have tested on. */ + int fd = open(fn, O_RDONLY | O_BINARY); +#else + int fd = open(fn, O_RDONLY); +#endif + if (fd == -1) { + perror("open"); + return 0; + } + fp = (knetFile*)calloc(1, sizeof(knetFile)); + fp->type = KNF_TYPE_LOCAL; + fp->fd = fd; + fp->ctrl_fd = -1; + } + if (fp && fp->fd == -1) { + knet_close(fp); + return 0; + } + return fp; +} + +knetFile *knet_dopen(int fd, const char *mode) +{ + knetFile *fp = (knetFile*)calloc(1, sizeof(knetFile)); + fp->type = KNF_TYPE_LOCAL; + fp->fd = fd; + return fp; +} + +off_t knet_read(knetFile *fp, void *buf, off_t len) +{ + off_t l = 0; + if (fp->fd == -1) return 0; + if (fp->type == KNF_TYPE_FTP) { + if (fp->is_ready == 0) { + if (!fp->no_reconnect) kftp_reconnect(fp); + kftp_connect_file(fp); + } + } else if (fp->type == KNF_TYPE_HTTP) { + if (fp->is_ready == 0) + khttp_connect_file(fp); + } + if (fp->type == KNF_TYPE_LOCAL) { // on Windows, the following block is necessary; not on UNIX + off_t rest = len, curr; + while (rest) { + do { + curr = read(fp->fd, buf + l, rest); + } while (curr < 0 && EINTR == errno); + if (curr < 0) return -1; + if (curr == 0) break; + l += curr; rest -= curr; + } + } else l = my_netread(fp->fd, buf, len); + fp->offset += l; + return l; +} + +off_t knet_seek(knetFile *fp, int64_t off, int whence) +{ + if (whence == SEEK_SET && off == fp->offset) return 0; + if (fp->type == KNF_TYPE_LOCAL) { + /* Be aware that lseek() returns the offset after seeking, + * while fseek() returns zero on success. */ + off_t offset = lseek(fp->fd, off, whence); + if (offset == -1) { + // Be silent, it is OK for knet_seek to fail when the file is streamed + // fprintf(stderr,"[knet_seek] %s\n", strerror(errno)); + return -1; + } + fp->offset = offset; + return off; + } else if (fp->type == KNF_TYPE_FTP) { + if (whence==SEEK_CUR) + fp->offset += off; + else if (whence==SEEK_SET) + fp->offset = off; + else if ( whence==SEEK_END) + fp->offset = fp->file_size+off; + fp->is_ready = 0; + return off; + } else if (fp->type == KNF_TYPE_HTTP) { + if (whence == SEEK_END) { // FIXME: can we allow SEEK_END in future? + fprintf(stderr, "[knet_seek] SEEK_END is not supported for HTTP. Offset is unchanged.\n"); + errno = ESPIPE; + return -1; + } + if (whence==SEEK_CUR) + fp->offset += off; + else if (whence==SEEK_SET) + fp->offset = off; + fp->is_ready = 0; + return off; + } + errno = EINVAL; + fprintf(stderr,"[knet_seek] %s\n", strerror(errno)); + return -1; +} + +int knet_close(knetFile *fp) +{ + if (fp == 0) return 0; + if (fp->ctrl_fd != -1) netclose(fp->ctrl_fd); // FTP specific + if (fp->fd != -1) { + /* On Linux/Mac, netclose() is an alias of close(), but on + * Windows, it is an alias of closesocket(). */ + if (fp->type == KNF_TYPE_LOCAL) close(fp->fd); + else netclose(fp->fd); + } + free(fp->host); free(fp->port); + free(fp->response); free(fp->retr); // FTP specific + free(fp->path); free(fp->http_host); // HTTP specific + free(fp); + return 0; +} + +#ifdef KNETFILE_MAIN +int main(void) +{ + char *buf; + knetFile *fp; + int type = 4, l; +#ifdef _WIN32 + knet_win32_init(); +#endif + buf = calloc(0x100000, 1); + if (type == 0) { + fp = knet_open("knetfile.c", "r"); + knet_seek(fp, 1000, SEEK_SET); + } else if (type == 1) { // NCBI FTP, large file + fp = knet_open("ftp://ftp.ncbi.nih.gov/1000genomes/ftp/data/NA12878/alignment/NA12878.chrom6.SLX.SRP000032.2009_06.bam", "r"); + knet_seek(fp, 2500000000ll, SEEK_SET); + l = knet_read(fp, buf, 255); + } else if (type == 2) { + fp = knet_open("ftp://ftp.sanger.ac.uk/pub4/treefam/tmp/index.shtml", "r"); + knet_seek(fp, 1000, SEEK_SET); + } else if (type == 3) { + fp = knet_open("http://www.sanger.ac.uk/Users/lh3/index.shtml", "r"); + knet_seek(fp, 1000, SEEK_SET); + } else if (type == 4) { + fp = knet_open("http://www.sanger.ac.uk/Users/lh3/ex1.bam", "r"); + knet_read(fp, buf, 10000); + knet_seek(fp, 20000, SEEK_SET); + knet_seek(fp, 10000, SEEK_SET); + l = knet_read(fp, buf+10000, 10000000) + 10000; + } + if (type != 4 && type != 1) { + knet_read(fp, buf, 255); + buf[255] = 0; + printf("%s\n", buf); + } else write(fileno(stdout), buf, l); + knet_close(fp); + free(buf); + return 0; +} +#endif |