/* * ws protocol handler plugin for "fulltext demo" * * Written in 2010-2019 by Andy Green * * 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) #define LWS_DLL #define LWS_INTERNAL #include #endif #include #include #include #include #include #ifdef WIN32 #include #endif #include 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 1; 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(end, p), "{\"indexed\": %d, \"ac\": [", !!pss->result); while (pss->ac && lws_ptr_diff(end, p) > 256) { p += lws_snprintf((char *)p, lws_ptr_diff(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(end, p), "], \"fp\": ["); } while (pss->fp && lws_ptr_diff(end, p) > 256) { if (!pss->fp_init_done) { p += lws_snprintf((char *)p, lws_ptr_diff(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(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(end, p), "]}"); } if (lws_write(wsi, (uint8_t *)start, lws_ptr_diff(p, start), 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) static const struct lws_protocols protocols[] = { LWS_PLUGIN_PROTOCOL_FULLTEXT_DEMO }; LWS_VISIBLE int init_protocol_fulltext_demo(struct lws_context *context, struct lws_plugin_capability *c) { if (c->api_magic != LWS_PLUGIN_API_MAGIC) { lwsl_err("Plugin API %d, library API %d", LWS_PLUGIN_API_MAGIC, c->api_magic); return 1; } c->protocols = protocols; c->count_protocols = LWS_ARRAY_SIZE(protocols); c->extensions = NULL; c->count_extensions = 0; return 0; } LWS_VISIBLE int destroy_protocol_fulltext_demo(struct lws_context *context) { return 0; } #endif