| /* |
| * ws protocol handler plugin for "fulltext demo" |
| * |
| * Written in 2010-2019 by Andy Green <andy@warmcat.com> |
| * |
| * This file is made available under the Creative Commons CC0 1.0 |
| * Universal Public Domain Dedication. |
| * |
| * The person who associated a work with this deed has dedicated |
| * the work to the public domain by waiving all of his or her rights |
| * to the work worldwide under copyright law, including all related |
| * and neighboring rights, to the extent allowed by law. You can copy, |
| * modify, distribute and perform the work, even for commercial purposes, |
| * all without asking permission. |
| * |
| * These test plugins are intended to be adapted for use in your code, which |
| * may be proprietary. So unlike the library itself, they are licensed |
| * Public Domain. |
| */ |
| |
| #if !defined (LWS_PLUGIN_STATIC) |
| #if !defined(LWS_DLL) |
| #define LWS_DLL |
| #endif |
| #if !defined(LWS_INTERNAL) |
| #define LWS_INTERNAL |
| #endif |
| #include <libwebsockets.h> |
| #endif |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #ifdef WIN32 |
| #include <io.h> |
| #endif |
| #include <stdio.h> |
| |
| struct vhd_fts_demo { |
| const char *indexpath; |
| }; |
| |
| struct pss_fts_demo { |
| struct lwsac *result; |
| struct lws_fts_result_autocomplete *ac; |
| struct lws_fts_result_filepath *fp; |
| |
| uint32_t *li; |
| int done; |
| |
| uint8_t first:1; |
| uint8_t ac_done:1; |
| |
| uint8_t fp_init_done:1; |
| }; |
| |
| static int |
| callback_fts(struct lws *wsi, enum lws_callback_reasons reason, void *user, |
| void *in, size_t len) |
| { |
| struct vhd_fts_demo *vhd = (struct vhd_fts_demo *) |
| lws_protocol_vh_priv_get(lws_get_vhost(wsi), |
| lws_get_protocol(wsi)); |
| struct pss_fts_demo *pss = (struct pss_fts_demo *)user; |
| uint8_t buf[LWS_PRE + 2048], *start = &buf[LWS_PRE], *p = start, |
| *end = &buf[sizeof(buf) - LWS_PRE - 1]; |
| struct lws_fts_search_params params; |
| const char *ccp = (const char *)in; |
| struct lws_fts_result *result; |
| struct lws_fts_file *jtf; |
| int n; |
| |
| switch (reason) { |
| |
| case LWS_CALLBACK_PROTOCOL_INIT: |
| vhd = lws_protocol_vh_priv_zalloc(lws_get_vhost(wsi), |
| lws_get_protocol(wsi),sizeof(struct vhd_fts_demo)); |
| if (!vhd) |
| return 0; |
| if (lws_pvo_get_str(in, "indexpath", |
| (const char **)&vhd->indexpath)) |
| return 1; |
| |
| return 0; |
| |
| case LWS_CALLBACK_HTTP: |
| |
| pss->first = 1; |
| pss->ac_done = 0; |
| |
| /* |
| * we have a "subdirectory" selecting the task |
| * |
| * /a/ = autocomplete |
| * /r/ = results |
| */ |
| |
| if (strncmp(ccp, "/a/", 3) && strncmp(ccp, "/r/", 3)) |
| goto reply_404; |
| |
| memset(¶ms, 0, sizeof(params)); |
| |
| params.needle = ccp + 3; |
| if (*(ccp + 1) == 'a') |
| params.flags = LWSFTS_F_QUERY_AUTOCOMPLETE; |
| if (*(ccp + 1) == 'r') |
| params.flags = LWSFTS_F_QUERY_FILES | |
| LWSFTS_F_QUERY_FILE_LINES | |
| LWSFTS_F_QUERY_QUOTE_LINE; |
| params.max_autocomplete = 10; |
| params.max_files = 10; |
| |
| jtf = lws_fts_open(vhd->indexpath); |
| if (!jtf) { |
| lwsl_err("unable to open %s\n", vhd->indexpath); |
| /* we'll inform the client in the JSON */ |
| goto reply_200; |
| } |
| |
| result = lws_fts_search(jtf, ¶ms); |
| lws_fts_close(jtf); |
| if (result) { |
| pss->result = params.results_head; |
| pss->ac = result->autocomplete_head; |
| pss->fp = result->filepath_head; |
| } |
| /* NULL result will be told in the json as "indexed": 0 */ |
| |
| reply_200: |
| if (lws_add_http_common_headers(wsi, HTTP_STATUS_OK, |
| "text/html", |
| LWS_ILLEGAL_HTTP_CONTENT_LEN, &p, end)) |
| return 1; |
| |
| if (lws_finalize_write_http_header(wsi, start, &p, end)) |
| return 1; |
| |
| lws_callback_on_writable(wsi); |
| return 0; |
| |
| reply_404: |
| if (lws_add_http_common_headers(wsi, HTTP_STATUS_NOT_FOUND, |
| "text/html", |
| LWS_ILLEGAL_HTTP_CONTENT_LEN, &p, end)) |
| return 1; |
| |
| if (lws_finalize_write_http_header(wsi, start, &p, end)) |
| return 1; |
| return lws_http_transaction_completed(wsi); |
| |
| case LWS_CALLBACK_CLOSED_HTTP: |
| if (pss && pss->result) |
| lwsac_free(&pss->result); |
| break; |
| |
| case LWS_CALLBACK_HTTP_WRITEABLE: |
| |
| if (!pss) |
| break; |
| |
| n = LWS_WRITE_HTTP; |
| if (pss->first) |
| p += lws_snprintf((char *)p, lws_ptr_diff_size_t(end, p), |
| "{\"indexed\": %d, \"ac\": [", !!pss->result); |
| |
| while (pss->ac && lws_ptr_diff(end, p) > 256) { |
| p += lws_snprintf((char *)p, lws_ptr_diff_size_t(end, p), |
| "%c{\"ac\": \"%s\",\"matches\": %d," |
| "\"agg\": %d, \"elided\": %d}", |
| pss->first ? ' ' : ',', (char *)(pss->ac + 1), |
| pss->ac->instances, pss->ac->agg_instances, |
| pss->ac->elided); |
| |
| pss->first = 0; |
| pss->ac = pss->ac->next; |
| } |
| |
| if (!pss->ac_done && !pss->ac && pss->fp) { |
| pss->ac_done = 1; |
| |
| p += lws_snprintf((char *)p, lws_ptr_diff_size_t(end, p), |
| "], \"fp\": ["); |
| } |
| |
| while (pss->fp && lws_ptr_diff_size_t(end, p) > 256) { |
| if (!pss->fp_init_done) { |
| p += lws_snprintf((char *)p, |
| lws_ptr_diff_size_t(end, p), |
| "%c{\"path\": \"%s\",\"matches\": %d," |
| "\"origlines\": %d," |
| "\"hits\": [", pss->first ? ' ' : ',', |
| ((char *)(pss->fp + 1)) + |
| pss->fp->matches_length, |
| pss->fp->matches, |
| pss->fp->lines_in_file); |
| |
| pss->li = ((uint32_t *)(pss->fp + 1)); |
| pss->done = 0; |
| pss->fp_init_done = 1; |
| pss->first = 0; |
| } else { |
| while (pss->done < pss->fp->matches && |
| lws_ptr_diff(end, p) > 256) { |
| |
| p += lws_snprintf((char *)p, |
| lws_ptr_diff_size_t(end, p), |
| "%c\n{\"l\":%d,\"o\":%d," |
| "\"s\":\"%s\"}", |
| !pss->done ? ' ' : ',', |
| pss->li[0], pss->li[1], |
| *((const char **)&pss->li[2])); |
| pss->li += 2 + (sizeof(const char *) / |
| sizeof(uint32_t)); |
| pss->done++; |
| } |
| |
| if (pss->done == pss->fp->matches) { |
| *p++ = ']'; |
| pss->fp_init_done = 0; |
| pss->fp = pss->fp->next; |
| if (!pss->fp) |
| *p++ = '}'; |
| } |
| } |
| } |
| |
| if (!pss->ac && !pss->fp) { |
| n = LWS_WRITE_HTTP_FINAL; |
| p += lws_snprintf((char *)p, lws_ptr_diff_size_t(end, p), |
| "]}"); |
| } |
| |
| if (lws_write(wsi, (uint8_t *)start, |
| lws_ptr_diff_size_t(p, start), (enum lws_write_protocol)n) != |
| lws_ptr_diff(p, start)) |
| return 1; |
| |
| if (n == LWS_WRITE_HTTP_FINAL) { |
| if (pss->result) |
| lwsac_free(&pss->result); |
| if (lws_http_transaction_completed(wsi)) |
| return -1; |
| } else |
| lws_callback_on_writable(wsi); |
| |
| return 0; |
| |
| default: |
| break; |
| } |
| |
| return lws_callback_http_dummy(wsi, reason, user, in, len); |
| } |
| |
| |
| #define LWS_PLUGIN_PROTOCOL_FULLTEXT_DEMO \ |
| { \ |
| "lws-test-fts", \ |
| callback_fts, \ |
| sizeof(struct pss_fts_demo), \ |
| 0, \ |
| 0, NULL, 0 \ |
| } |
| |
| #if !defined (LWS_PLUGIN_STATIC) |
| |
| LWS_VISIBLE const struct lws_protocols fulltext_demo_protocols[] = { |
| LWS_PLUGIN_PROTOCOL_FULLTEXT_DEMO |
| }; |
| |
| LWS_VISIBLE const lws_plugin_protocol_t fulltext_demo = { |
| .hdr = { |
| "fulltext demo", |
| "lws_protocol_plugin", |
| LWS_BUILD_HASH, |
| LWS_PLUGIN_API_MAGIC |
| }, |
| |
| .protocols = fulltext_demo_protocols, |
| .count_protocols = LWS_ARRAY_SIZE(fulltext_demo_protocols), |
| .extensions = NULL, |
| .count_extensions = 0, |
| }; |
| |
| #endif |