/client.c
http://github.com/nicolasff/webdis · C · 372 lines · 347 code · 20 blank · 5 comment · 3 complexity · 8fc02eb21d31b8bc0cc1a06bf86ab230 MD5 · raw file
- #include "client.h"
- #include "http_parser.h"
- #include "http.h"
- #include "server.h"
- #include "worker.h"
- #include "websocket.h"
- #include "cmd.h"
- #include "conf.h"
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <errno.h>
- #include <hiredis/hiredis.h>
- #include <hiredis/async.h>
- #define CHECK_ALLOC(c, ptr) if(!(ptr)) { c->failed_alloc = 1; return -1;}
- static int
- http_client_on_url(struct http_parser *p, const char *at, size_t sz) {
- struct http_client *c = p->data;
- CHECK_ALLOC(c, c->path = realloc(c->path, c->path_sz + sz + 1));
- memcpy(c->path + c->path_sz, at, sz);
- c->path_sz += sz;
- c->path[c->path_sz] = 0;
- return 0;
- }
- /*
- * Called when the body is parsed.
- */
- static int
- http_client_on_body(struct http_parser *p, const char *at, size_t sz) {
- struct http_client *c = p->data;
- return http_client_add_to_body(c, at, sz);
- }
- int
- http_client_add_to_body(struct http_client *c, const char *at, size_t sz) {
- CHECK_ALLOC(c, c->body = realloc(c->body, c->body_sz + sz + 1));
- memcpy(c->body + c->body_sz, at, sz);
- c->body_sz += sz;
- c->body[c->body_sz] = 0;
- return 0;
- }
- static int
- http_client_on_header_name(struct http_parser *p, const char *at, size_t sz) {
- struct http_client *c = p->data;
- size_t n = c->header_count;
- /* if we're not adding to the same header name as last time, realloc to add one field. */
- if(c->last_cb != LAST_CB_KEY) {
- n = ++c->header_count;
- CHECK_ALLOC(c, c->headers = realloc(c->headers, n * sizeof(struct http_header)));
- memset(&c->headers[n-1], 0, sizeof(struct http_header));
- }
- /* Add data to the current header name. */
- CHECK_ALLOC(c, c->headers[n-1].key = realloc(c->headers[n-1].key,
- c->headers[n-1].key_sz + sz + 1));
- memcpy(c->headers[n-1].key + c->headers[n-1].key_sz, at, sz);
- c->headers[n-1].key_sz += sz;
- c->headers[n-1].key[c->headers[n-1].key_sz] = 0;
- c->last_cb = LAST_CB_KEY;
- return 0;
- }
- static char *
- wrap_filename(const char *val, size_t val_len) {
- char format[] = "attachment; filename=\"";
- size_t sz = sizeof(format) - 1 + val_len + 1;
- char *p = calloc(sz + 1, 1);
- memcpy(p, format, sizeof(format)-1); /* copy format */
- memcpy(p + sizeof(format)-1, val, val_len); /* copy filename */
- p[sz-1] = '"';
- return p;
- }
- /*
- * Split query string into key/value pairs, process some of them.
- */
- static int
- http_client_on_query_string(struct http_parser *parser, const char *at, size_t sz) {
- struct http_client *c = parser->data;
- const char *p = at;
- while(p < at + sz) {
- const char *key = p, *val;
- int key_len, val_len;
- char *eq = memchr(key, '=', sz - (p-at));
- if(!eq || eq > at + sz) { /* last argument */
- break;
- } else { /* found an '=' */
- char *amp;
- val = eq + 1;
- key_len = eq - key;
- p = eq + 1;
- amp = memchr(p, '&', sz - (p-at));
- if(!amp || amp > at + sz) {
- val_len = at + sz - p; /* last arg */
- } else {
- val_len = amp - val; /* cur arg */
- p = amp + 1;
- }
- if(key_len == 4 && strncmp(key, "type", 4) == 0) {
- c->type = calloc(1 + val_len, 1);
- memcpy(c->type, val, val_len);
- } else if((key_len == 5 && strncmp(key, "jsonp", 5) == 0)
- || (key_len == 8 && strncmp(key, "callback", 8) == 0)) {
- c->jsonp = calloc(1 + val_len, 1);
- memcpy(c->jsonp, val, val_len);
- } else if(key_len == 3 && strncmp(key, "sep", 3) == 0) {
- c->separator = calloc(1 + val_len, 1);
- memcpy(c->separator, val, val_len);
- } else if(key_len == 8 && strncmp(key, "filename", 8) == 0) {
- c->filename = wrap_filename(val, val_len);
- }
- if(!amp) {
- break;
- }
- }
- }
- return 0;
- }
- static int
- http_client_on_header_value(struct http_parser *p, const char *at, size_t sz) {
- struct http_client *c = p->data;
- size_t n = c->header_count;
- /* Add data to the current header value. */
- CHECK_ALLOC(c, c->headers[n-1].val = realloc(c->headers[n-1].val,
- c->headers[n-1].val_sz + sz + 1));
- memcpy(c->headers[n-1].val + c->headers[n-1].val_sz, at, sz);
- c->headers[n-1].val_sz += sz;
- c->headers[n-1].val[c->headers[n-1].val_sz] = 0;
- c->last_cb = LAST_CB_VAL;
- /* react to some values. */
- if(strncmp("Expect", c->headers[n-1].key, c->headers[n-1].key_sz) == 0) {
- if(sz == 12 && strncasecmp(at, "100-continue", sz) == 0) {
- /* support HTTP file upload */
- char http100[] = "HTTP/1.1 100 Continue\r\n\r\n";
- int ret = write(c->fd, http100, sizeof(http100)-1);
- (void)ret;
- }
- } else if(strncasecmp("Connection", c->headers[n-1].key, c->headers[n-1].key_sz) == 0) {
- if(sz == 10 && strncasecmp(at, "Keep-Alive", sz) == 0) {
- c->keep_alive = 1;
- }
- }
- return 0;
- }
- static int
- http_client_on_message_complete(struct http_parser *p) {
- struct http_client *c = p->data;
- /* keep-alive detection */
- if (c->parser.flags & F_CONNECTION_CLOSE) {
- c->keep_alive = 0;
- } else if(c->parser.http_major == 1 && c->parser.http_minor == 1) { /* 1.1 */
- c->keep_alive = 1;
- }
- c->http_version = c->parser.http_minor;
- if(p->upgrade && c->w->s->cfg->websockets) { /* WebSocket, don't execute just yet */
- c->is_websocket = 1;
- return 0;
- }
- /* handle default root object */
- if(c->path_sz == 1 && *c->path == '/' && c->w->s->cfg->default_root) { /* replace */
- free(c->path);
- c->path = strdup(c->w->s->cfg->default_root);
- c->path_sz = strlen(c->path);
- }
- worker_process_client(c);
- http_client_reset(c);
- return 0;
- }
- struct http_client *
- http_client_new(struct worker *w, int fd, in_addr_t addr) {
- struct http_client *c = calloc(1, sizeof(struct http_client));
- c->fd = fd;
- c->w = w;
- c->addr = addr;
- c->s = w->s;
- /* parser */
- http_parser_init(&c->parser, HTTP_REQUEST);
- c->parser.data = c;
- /* callbacks */
- c->settings.on_url = http_client_on_url;
- c->settings.on_query_string = http_client_on_query_string;
- c->settings.on_body = http_client_on_body;
- c->settings.on_message_complete = http_client_on_message_complete;
- c->settings.on_header_field = http_client_on_header_name;
- c->settings.on_header_value = http_client_on_header_value;
- c->last_cb = LAST_CB_NONE;
- return c;
- }
- void
- http_client_reset(struct http_client *c) {
- int i;
- /* headers */
- for(i = 0; i < c->header_count; ++i) {
- free(c->headers[i].key);
- free(c->headers[i].val);
- }
- free(c->headers);
- c->headers = NULL;
- c->header_count = 0;
- /* other data */
- free(c->body); c->body = NULL;
- c->body_sz = 0;
- free(c->path); c->path = NULL;
- c->path_sz = 0;
- free(c->type); c->type = NULL;
- free(c->jsonp); c->jsonp = NULL;
- free(c->filename); c->filename = NULL;
- c->request_sz = 0;
- /* no last known header callback */
- c->last_cb = LAST_CB_NONE;
- /* mark as broken if client doesn't support Keep-Alive. */
- if(c->keep_alive == 0) {
- c->broken = 1;
- }
- }
- void
- http_client_free(struct http_client *c) {
- http_client_reset(c);
- free(c->buffer);
- free(c);
- }
- int
- http_client_read(struct http_client *c) {
- char buffer[4096];
- int ret;
- ret = read(c->fd, buffer, sizeof(buffer));
- if(ret <= 0) {
- /* broken link, free buffer and client object */
- /* disconnect pub/sub client if there is one. */
- if(c->pub_sub && c->pub_sub->ac) {
- struct cmd *cmd = c->pub_sub;
- /* disconnect from all channels */
- redisAsyncDisconnect(c->pub_sub->ac);
- if(c->pub_sub) c->pub_sub->ac = NULL;
- c->pub_sub = NULL;
- /* delete command object */
- cmd_free(cmd);
- }
- close(c->fd);
- http_client_free(c);
- return (int)CLIENT_DISCONNECTED;
- }
- /* save what we've just read */
- c->buffer = realloc(c->buffer, c->sz + ret);
- if(!c->buffer) {
- return (int)CLIENT_OOM;
- }
- memcpy(c->buffer + c->sz, buffer, ret);
- c->sz += ret;
- /* keep track of total sent */
- c->request_sz += ret;
- return ret;
- }
- int
- http_client_remove_data(struct http_client *c, size_t sz) {
- char *buffer;
- if(c->sz < sz)
- return -1;
- /* replace buffer */
- CHECK_ALLOC(c, buffer = malloc(c->sz - sz));
- memcpy(buffer, c->buffer + sz, c->sz - sz);
- free(c->buffer);
- c->buffer = buffer;
- c->sz -= sz;
- return 0;
- }
- int
- http_client_execute(struct http_client *c) {
- int nparsed = http_parser_execute(&c->parser, &c->settings, c->buffer, c->sz);
- if(!c->is_websocket) {
- /* removed consumed data, all has been copied already. */
- free(c->buffer);
- c->buffer = NULL;
- c->sz = 0;
- }
- return nparsed;
- }
- /*
- * Find header value, returns NULL if not found.
- */
- const char *
- client_get_header(struct http_client *c, const char *key) {
- int i;
- size_t sz = strlen(key);
- for(i = 0; i < c->header_count; ++i) {
- if(sz == c->headers[i].key_sz &&
- strncasecmp(key, c->headers[i].key, sz) == 0) {
- return c->headers[i].val;
- }
- }
- return NULL;
- }