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-rw-r--r--tileserver/tileserver.c524
1 files changed, 0 insertions, 524 deletions
diff --git a/tileserver/tileserver.c b/tileserver/tileserver.c
deleted file mode 100644
index 672319c11..000000000
--- a/tileserver/tileserver.c
+++ /dev/null
@@ -1,524 +0,0 @@
-/*
- * tileserver.c:
- * Serve map tiles and information about map tiles.
- *
- * Copyright (c) 2006 UK Citizens Online Democracy. All rights reserved.
- * Email: chris@mysociety.org; WWW: http://www.mysociety.org/
- *
- */
-
-static const char rcsid[] = "$Id: tileserver.c,v 1.10 2006-09-22 12:25:43 chris Exp $";
-
-/*
- * This is slightly complicated by the fact that we indirect tile references
- * via hashes of the tiles themselves. We support the following queries:
- *
- * http://host/path/tileserver/TILESET/HASH
- * to get an individual tile image in TILESET identified by HASH;
- * http://host/path/tileserver/TILESET/E,N/FORMAT
- * to get the identity of the tile at (E, N) in TILESET in the given
- * FORMAT;
- * http://host/path/tileserver/TILESET/W-E,S-N/FORMAT
- * to get the identities of the tiles in the block with SW corner (W, S)
- * and NE corner (E, N) in the given FORMAT.
- *
- * What FORMATS should we support? RABX and JSON are the obvious ones I guess.
- * Add TEXT for debugging.
- */
-
-#include <sys/types.h>
-
-#include <errno.h>
-#ifndef NO_FASTCGI
-#include <fcgi_stdio.h>
-#endif
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <sys/stat.h>
-
-#include "base64.h"
-#include "netstring.h"
-#include "tileset.h"
-#include "util.h"
-
-/* tiles_basedir
- * The configured path to tilesets. */
-static char *tiles_basedir;
-
-#define HTTP_BAD_REQUEST 400
-#define HTTP_UNAUTHORIZED 401
-#define HTTP_FORBIDDEN 403
-#define HTTP_NOT_FOUND 404
-#define HTTP_INTERNAL_SERVER_ERROR 500
-#define HTTP_NOT_IMPLEMENTED 501
-#define HTTP_SERVICE_UNAVAILABLE 503
-
-/* error STATUS TEXT
- * Send an error to the client with the given HTTP STATUS and TEXT. */
-void error(int status, const char *s) {
- if (status < 100 || status > 999)
- status = 500;
- printf(
- "Status: %03d\r\n"
- "Content-Type: text/plain; charset=us-ascii\r\n"
- "Content-Length: %u\r\n"
- "\r\n"
- "%s\n",
- status,
- strlen(s) + 1,
- s);
-}
-
-/* struct request
- * Definition of a request we handle. */
-struct request {
- char *r_tileset;
- enum {
- FN_GET_TILE = 0,
- FN_GET_TILEIDS
- } r_function;
-
- uint8_t r_tileid[TILEID_LEN];
-
- int r_west, r_east, r_south, r_north;
- enum {
- F_RABX,
- F_JSON,
- F_TEXT,
- F_HTML
- } r_format;
-
- char *r_buf;
-};
-
-void request_free(struct request *R);
-
-/* request_parse PATHINFO
- * Parse a request from PATHINFO. Returns a request on success or NULL on
- * failure. */
-struct request *request_parse(const char *path_info) {
- const char *p, *q;
- struct request *R = NULL, Rz = {0};
-
- /* Some trivial syntax checks. */
- if (!*path_info || *path_info == '/' || !strchr(path_info, '/')) {
- err("PATH_INFO of \"%s\" is not a valid request", path_info);
- return NULL;
- }
-
-
- /*
- * TILESET/HASH
- * TILESET/E,N/FORMAT
- * TILESET/W-E,S-N/FORMAT
- */
-
- /* Tileset name consists of alphanumerics and hyphen. */
- p = path_info + strspn(path_info,
- "0123456789"
- "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
- "abcdefghijklmnopqrstuvwxyz"
- "-");
-
- if (*p != '/')
- return NULL;
-
- R = xmalloc(sizeof *R);
- *R = Rz;
- R->r_buf = xmalloc(strlen(path_info) + 1);
- R->r_tileset = R->r_buf;
-
- strncpy(R->r_tileset, path_info, p - path_info);
- R->r_tileset[p - path_info] = 0;
-
- ++p;
-
- /* Mode. */
- if ((q = strchr(p, '/'))) {
- /* Tile IDs request. */
- R->r_function = FN_GET_TILEIDS;
-
- /* Identify format requested. */
- ++q;
- if (!strcmp(q, "RABX"))
- R->r_format = F_RABX;
- else if (!strcmp(q, "JSON"))
- R->r_format = F_JSON;
- else if (!strcmp(q, "text"))
- R->r_format = F_TEXT;
- else if (!strcmp(q, "html"))
- R->r_format = F_HTML;
- else {
- err("request for unknown tile ID result format \"%s\"", q);
- goto fail;
- }
-
- if (4 == sscanf(p, "%d-%d,%d-%d",
- &R->r_west, &R->r_east, &R->r_south, &R->r_north)) {
- if (R->r_west < 0 || R->r_south < 0
- || R->r_east < R->r_west || R->r_north < R->r_south) {
- err("area range query has invalid coordinates or order");
- goto fail;
- } else
- return R;
- } else if (2 == sscanf(p, "%d,%d", &R->r_west, &R->r_south)) {
- R->r_east = R->r_west;
- R->r_north = R->r_south;
- if (R->r_west < 0 || R->r_south < 0) {
- err("tile ID query has negative coordinates");
- goto fail;
- } else
- return R;
- }
- } else {
- size_t l;
-
- /* Tile request. */
- R->r_function = FN_GET_TILE;
- if (strlen(p) != TILEID_LEN_B64)
- goto fail;
-
- /* Decode it. Really this is "base64ish", so that we don't have to
- * deal with '+' or '/' in the URL. */
- base64_decode(p, R->r_tileid, &l, 1);
- if (l != TILEID_LEN)
- goto fail;
-
- return R;
- }
-
-fail:
- request_free(R);
- return NULL;
-}
-
-/* request_free R
- * Free storage allocated for R. */
-void request_free(struct request *R) {
- if (!R) return;
- xfree(R->r_buf);
- xfree(R);
-}
-
-void handle_request(void) {
- char *path_info;
- struct request *R;
- static char *path;
- static size_t pathlen;
- size_t l;
- tileset T;
- time_t now;
- struct tm *tm;
- char date[32];
- const char *last_modified = "Wed, 20 Sep 2006 17:27:40 GMT";
- const unsigned cache_max_age = 365 * 86400;
-
- /* Date: header is required if we give a 304 Not Modified response. */
- time(&now);
- tm = gmtime(&now);
- strftime(date, sizeof date, "%a, %d %b %Y %H:%M:%S GMT", tm);
-
- /* All requests are given via PATH_INFO. */
- if (!(path_info = getenv("PATH_INFO"))) {
- error(400, "No request path supplied");
- return;
- }
-
- if ('/' == *path_info)
- ++path_info;
-
- if (!(R = request_parse(path_info))) {
- error(400, "Bad request");
- return;
- }
-
- /* So we have a valid request. */
- l = strlen(R->r_tileset) + strlen(tiles_basedir) + 2;
- if (pathlen < l)
- path = xrealloc(path, pathlen = l);
- sprintf(path, "%s/%s", tiles_basedir, R->r_tileset);
-
- if (!(T = tileset_open(path))) {
- error(404, "Tileset not found");
- /* XXX assumption about the nature of the error */
- request_free(R);
- return;
- }
-
- /* XXX this is poor -- if the client sends If-Modified-Since: we just
- * assume that it hasn't been. We might want to do something more clever at
- * some point. */
- if (getenv("HTTP_IF_MODIFIED_SINCE")) {
- printf(
- "Status: 304 Not Modified\r\n"
- "Date: %s\r\n"
- "\r\n", date);
- tileset_close(T);
- request_free(R);
- return;
- }
-
- if (FN_GET_TILE == R->r_function) {
- /*
- * Send a single tile image to the client.
- */
- void *buf;
- size_t len;
-
- if ((buf = tileset_get_tile(T, R->r_tileid, &len))) {
- printf(
- "Content-Type: image/png\r\n"
- "Content-Length: %u\r\n"
- "Last-Modified: %s\r\n"
- "Date: %s\r\n"
- "Cache-Control: max-age=%u\r\n"
- "\r\n", len, last_modified, date, cache_max_age);
- fwrite(buf, 1, len, stdout);
- xfree(buf);
- } else
- error(404, "Tile not found");
- /* XXX error assumption */
- } else if (FN_GET_TILEIDS == R->r_function) {
- /*
- * Send one or more tile IDs to the client, in some useful format.
- */
- unsigned x, y;
- static char *buf;
- static size_t buflen, n;
- unsigned rows, cols;
- char *p;
-
- rows = R->r_north + 1 - R->r_south;
- cols = R->r_east + 1 - R->r_west;
- n = cols * rows;
- if (buflen < n * TILEID_LEN_B64 + 256)
- buf = xrealloc(buf, buflen = n * TILEID_LEN_B64 + 256);
-
- /* Send start of array in whatever format. */
- p = buf;
- switch (R->r_format) {
- case F_RABX:
- /* Format as array of arrays. */
- *(p++) = 'L';
- p += netstring_write_int(p, (int)rows);
- break;
-
- case F_JSON:
- /* Ditto. */
- *(p++) = '[';
- break;
-
- case F_TEXT:
- /* Space and LF separated matrix so no special leader. */
- break;
-
- case F_HTML:
- strcpy(p,
- "<html><head><title>tileserver test</title></head><body>");
- p += strlen(p);
-
- if (R->r_west > 0)
- p += sprintf(p, "<a href=\"../%u-%u,%u-%u/html\">west</a> ",
- R->r_west - 1, R->r_east - 1,
- R->r_south, R->r_north);
- p += sprintf(p, "<a href=\"../%u-%u,%u-%u/html\">east</a> ",
- R->r_west + 1, R->r_east + 1,
- R->r_south, R->r_north);
-
- p += sprintf(p, "<a href=\"../%u-%u,%u-%u/html\">north</a> ",
- R->r_west, R->r_east,
- R->r_south + 1, R->r_north + 1);
- if (R->r_south > 0)
- p += sprintf(p, "<a href=\"../%u-%u,%u-%u/html\">south</a> ",
- R->r_west, R->r_east,
- R->r_south - 1, R->r_north - 1);
- p += sprintf(p, "<br>");
- break;
- }
-
- /* Iterate over tile IDs. */
- for (y = R->r_north; y >= R->r_south; --y) {
- switch (R->r_format) {
- case F_RABX:
- *(p++) = 'L';
- p += netstring_write_int(p, (int)cols);
- break;
-
- case F_JSON:
- *(p++) = '[';
- break;
-
- case F_TEXT:
- break; /* nothing */
-
- case F_HTML:
- break; /* nothing */
- }
-
- for (x = R->r_west; x <= R->r_east; ++x) {
- uint8_t id[TILEID_LEN];
- char idb64[TILEID_LEN_B64 + 1];
- bool isnull = 0;
-
- if (!(tileset_get_tileid(T, x, y, id)))
- isnull = 1;
- else
- base64_encode(id, TILEID_LEN, idb64, 1, 1);
-
- if (p + 256 > buf + buflen) {
- size_t n;
- n = p - buf;
- buf = xrealloc(buf, buflen *= 2);
- p = buf + n;
- }
-
- switch (R->r_format) {
- case F_RABX:
- if (isnull)
- *(p++) = 'N';
- else {
- *(p++) = 'T';
- p += netstring_write_string(p, idb64);
- }
- break;
-
- case F_JSON:
- if (isnull) {
- strcpy(p, "null");
- p += 4;
- } else {
- *(p++) = '"';
- strcpy(p, idb64);
- p += TILEID_LEN_B64;
- *(p++) = '"';
- }
- if (x < R->r_east)
- *(p++) = ',';
- break;
-
- case F_TEXT:
- if (isnull)
- *(p++) = '-';
- else {
- strcpy(p, idb64);
- p += TILEID_LEN_B64;
- }
- if (x < R->r_east)
- *(p++) = ' ';
- break;
-
- case F_HTML:
- if (isnull)
- ; /* not much we can do without the tile sizes */
- else
- p += sprintf(p,
- "<img title=\"%u,%u\" src=\"../%s\">",
- x, y,
- idb64);
- break;
- }
- }
-
- switch (R->r_format) {
- case F_RABX:
- break; /* no row terminator */
-
- case F_JSON:
- *(p++) = ']';
- if (y < R->r_north)
- *(p++) = ',';
- break;
-
- case F_TEXT:
- *(p++) = '\n';
- break;
-
- case F_HTML:
- p += sprintf(p, "<br>");
- break;
- }
- }
-
- /* Array terminator. */
- switch (R->r_format) {
- case F_RABX:
- break;
-
- case F_JSON:
- *(p++) = ']';
- break;
-
- case F_TEXT:
- break;
-
- case F_HTML:
- p += sprintf(p, "</body></html>");
- }
- /* NB no terminating NUL */
-
- /* Actually send it. */
- printf("Content-Type: ");
- switch (R->r_format) {
- case F_RABX:
- printf("application/octet-stream");
- break;
-
- case F_JSON:
- /* Not really clear what CT to use here but Yahoo use
- * "text/javascript" and presumably they've done more testing
- * than us.... */
- printf("text/javascript");
- break;
-
- case F_TEXT:
- printf("text/plain; charset=us-ascii");
- break;
-
- case F_HTML:
- printf("text/html; charset=us-ascii");
- break;
- }
- printf("\r\n"
- "Content-Length: %u\r\n"
- "Last-Modified: %s\r\n"
- "Date: %s\r\n"
- "Cache-Control: max-age=%u\r\n"
- "\r\n",
- (unsigned)(p - buf), last_modified, date, cache_max_age);
-
- fwrite(buf, 1, p - buf, stdout);
- }
-
- tileset_close(T);
- request_free(R);
-}
-
-int main(int argc, char *argv[]) {
- struct stat st;
- bool initialised = 0;
-
-#ifndef NO_FASTCGI
- while (FCGI_Accept() >= 0)
-#endif
- {
- /* Stupid order since with fcgi_stdio if we haven't called FCGI_Accept
- * we don't get any stderr output.... */
- if (!initialised) {
- if (argc != 2)
- die("single argument is path to tile sets");
- tiles_basedir = argv[1];
- if (-1 == stat(tiles_basedir, &st))
- die("%s: stat: %s", tiles_basedir, strerror(errno));
- else if (!S_ISDIR(st.st_mode))
- die("%s: Not a directory", tiles_basedir);
- initialised = 1;
- }
-
- handle_request();
- }
-
- return 0;
-}
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