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f7149e90c2
https://libwebsockets.org/pipermail/libwebsockets/2019-April/007937.html thanks to Bruce Perens for noting it. This doesn't change the intention or status of the CC0 files, they were pure CC0 before (ie, public domain) and they are pure CC0 now. It just gets rid of the (C) part at the top of the dedication which may be read to be a bit contradictory since the purpose is to make it public domain.
293 lines
6.8 KiB
C
293 lines
6.8 KiB
C
/*
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* ws protocol handler plugin for "fulltext demo"
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*
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* Written in 2010-2019 by Andy Green <andy@warmcat.com>
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*
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* This file is made available under the Creative Commons CC0 1.0
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* Universal Public Domain Dedication.
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*
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* The person who associated a work with this deed has dedicated
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* the work to the public domain by waiving all of his or her rights
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* to the work worldwide under copyright law, including all related
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* and neighboring rights, to the extent allowed by law. You can copy,
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* modify, distribute and perform the work, even for commercial purposes,
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* all without asking permission.
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*
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* These test plugins are intended to be adapted for use in your code, which
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* may be proprietary. So unlike the library itself, they are licensed
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* Public Domain.
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*/
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#if !defined (LWS_PLUGIN_STATIC)
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#define LWS_DLL
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#define LWS_INTERNAL
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#include <libwebsockets.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef WIN32
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#include <io.h>
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#endif
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#include <stdio.h>
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struct vhd_fts_demo {
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const char *indexpath;
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};
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struct pss_fts_demo {
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struct lwsac *result;
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struct lws_fts_result_autocomplete *ac;
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struct lws_fts_result_filepath *fp;
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uint32_t *li;
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int done;
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uint8_t first:1;
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uint8_t ac_done:1;
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uint8_t fp_init_done:1;
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};
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static int
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callback_fts(struct lws *wsi, enum lws_callback_reasons reason, void *user,
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void *in, size_t len)
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{
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struct vhd_fts_demo *vhd = (struct vhd_fts_demo *)
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lws_protocol_vh_priv_get(lws_get_vhost(wsi),
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lws_get_protocol(wsi));
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struct pss_fts_demo *pss = (struct pss_fts_demo *)user;
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uint8_t buf[LWS_PRE + 2048], *start = &buf[LWS_PRE], *p = start,
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*end = &buf[sizeof(buf) - LWS_PRE - 1];
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struct lws_fts_search_params params;
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const char *ccp = (const char *)in;
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struct lws_fts_result *result;
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struct lws_fts_file *jtf;
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int n;
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switch (reason) {
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case LWS_CALLBACK_PROTOCOL_INIT:
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vhd = lws_protocol_vh_priv_zalloc(lws_get_vhost(wsi),
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lws_get_protocol(wsi),sizeof(struct vhd_fts_demo));
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if (!vhd)
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return 1;
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if (lws_pvo_get_str(in, "indexpath",
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(const char **)&vhd->indexpath))
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return 1;
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return 0;
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case LWS_CALLBACK_HTTP:
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pss->first = 1;
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pss->ac_done = 0;
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/*
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* we have a "subdirectory" selecting the task
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*
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* /a/ = autocomplete
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* /r/ = results
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*/
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if (strncmp(ccp, "/a/", 3) && strncmp(ccp, "/r/", 3))
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goto reply_404;
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memset(¶ms, 0, sizeof(params));
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params.needle = ccp + 3;
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if (*(ccp + 1) == 'a')
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params.flags = LWSFTS_F_QUERY_AUTOCOMPLETE;
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if (*(ccp + 1) == 'r')
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params.flags = LWSFTS_F_QUERY_FILES |
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LWSFTS_F_QUERY_FILE_LINES |
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LWSFTS_F_QUERY_QUOTE_LINE;
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params.max_autocomplete = 10;
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params.max_files = 10;
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jtf = lws_fts_open(vhd->indexpath);
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if (!jtf) {
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lwsl_err("unable to open %s\n", vhd->indexpath);
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/* we'll inform the client in the JSON */
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goto reply_200;
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}
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result = lws_fts_search(jtf, ¶ms);
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lws_fts_close(jtf);
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if (result) {
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pss->result = params.results_head;
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pss->ac = result->autocomplete_head;
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pss->fp = result->filepath_head;
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}
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/* NULL result will be told in the json as "indexed": 0 */
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reply_200:
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if (lws_add_http_common_headers(wsi, HTTP_STATUS_OK,
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"text/html",
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LWS_ILLEGAL_HTTP_CONTENT_LEN, &p, end))
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return 1;
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if (lws_finalize_write_http_header(wsi, start, &p, end))
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return 1;
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lws_callback_on_writable(wsi);
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return 0;
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reply_404:
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if (lws_add_http_common_headers(wsi, HTTP_STATUS_NOT_FOUND,
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"text/html",
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LWS_ILLEGAL_HTTP_CONTENT_LEN, &p, end))
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return 1;
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if (lws_finalize_write_http_header(wsi, start, &p, end))
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return 1;
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return lws_http_transaction_completed(wsi);
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case LWS_CALLBACK_CLOSED_HTTP:
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if (pss && pss->result)
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lwsac_free(&pss->result);
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break;
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case LWS_CALLBACK_HTTP_WRITEABLE:
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if (!pss)
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break;
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n = LWS_WRITE_HTTP;
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if (pss->first)
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p += lws_snprintf((char *)p, lws_ptr_diff(end, p),
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"{\"indexed\": %d, \"ac\": [", !!pss->result);
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while (pss->ac && lws_ptr_diff(end, p) > 256) {
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p += lws_snprintf((char *)p, lws_ptr_diff(end, p),
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"%c{\"ac\": \"%s\",\"matches\": %d,"
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"\"agg\": %d, \"elided\": %d}",
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pss->first ? ' ' : ',', (char *)(pss->ac + 1),
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pss->ac->instances, pss->ac->agg_instances,
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pss->ac->elided);
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pss->first = 0;
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pss->ac = pss->ac->next;
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}
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if (!pss->ac_done && !pss->ac && pss->fp) {
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pss->ac_done = 1;
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p += lws_snprintf((char *)p, lws_ptr_diff(end, p),
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"], \"fp\": [");
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}
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while (pss->fp && lws_ptr_diff(end, p) > 256) {
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if (!pss->fp_init_done) {
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p += lws_snprintf((char *)p,
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lws_ptr_diff(end, p),
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"%c{\"path\": \"%s\",\"matches\": %d,"
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"\"origlines\": %d,"
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"\"hits\": [", pss->first ? ' ' : ',',
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((char *)(pss->fp + 1)) +
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pss->fp->matches_length,
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pss->fp->matches,
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pss->fp->lines_in_file);
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pss->li = ((uint32_t *)(pss->fp + 1));
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pss->done = 0;
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pss->fp_init_done = 1;
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pss->first = 0;
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} else {
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while (pss->done < pss->fp->matches &&
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lws_ptr_diff(end, p) > 256) {
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p += lws_snprintf((char *)p,
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lws_ptr_diff(end, p),
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"%c\n{\"l\":%d,\"o\":%d,"
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"\"s\":\"%s\"}",
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!pss->done ? ' ' : ',',
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pss->li[0], pss->li[1],
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*((const char **)&pss->li[2]));
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pss->li += 2 + (sizeof(const char *) /
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sizeof(uint32_t));
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pss->done++;
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}
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if (pss->done == pss->fp->matches) {
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*p++ = ']';
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pss->fp_init_done = 0;
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pss->fp = pss->fp->next;
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if (!pss->fp)
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*p++ = '}';
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}
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}
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}
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if (!pss->ac && !pss->fp) {
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n = LWS_WRITE_HTTP_FINAL;
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p += lws_snprintf((char *)p, lws_ptr_diff(end, p),
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"]}");
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}
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if (lws_write(wsi, (uint8_t *)start,
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lws_ptr_diff(p, start), n) !=
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lws_ptr_diff(p, start))
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return 1;
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if (n == LWS_WRITE_HTTP_FINAL) {
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if (pss->result)
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lwsac_free(&pss->result);
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if (lws_http_transaction_completed(wsi))
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return -1;
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} else
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lws_callback_on_writable(wsi);
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return 0;
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default:
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break;
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}
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return lws_callback_http_dummy(wsi, reason, user, in, len);
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}
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#define LWS_PLUGIN_PROTOCOL_FULLTEXT_DEMO \
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{ \
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"lws-test-fts", \
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callback_fts, \
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sizeof(struct pss_fts_demo), \
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0, \
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0, NULL, 0 \
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}
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#if !defined (LWS_PLUGIN_STATIC)
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static const struct lws_protocols protocols[] = {
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LWS_PLUGIN_PROTOCOL_FULLTEXT_DEMO
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};
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LWS_EXTERN LWS_VISIBLE int
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init_protocol_fulltext_demo(struct lws_context *context,
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struct lws_plugin_capability *c)
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{
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if (c->api_magic != LWS_PLUGIN_API_MAGIC) {
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lwsl_err("Plugin API %d, library API %d", LWS_PLUGIN_API_MAGIC,
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c->api_magic);
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return 1;
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}
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c->protocols = protocols;
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c->count_protocols = LWS_ARRAY_SIZE(protocols);
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c->extensions = NULL;
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c->count_extensions = 0;
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return 0;
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}
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LWS_EXTERN LWS_VISIBLE int
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destroy_protocol_fulltext_demo(struct lws_context *context)
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{
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return 0;
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}
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#endif
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