C++ buffer_copy_buffer函数代码示例

static int cache_call_lua(server *srv, connection *con, plugin_data *p, buffer *cml_file) {
	buffer *b;
	char *c;

	/* cleanup basedir */
	b = p->baseurl;
	buffer_copy_buffer(b, con->uri.path);
	for (c = b->ptr + buffer_string_length(b); c > b->ptr && *c != '/'; c--);

	if (*c == '/') {
		buffer_string_set_length(b, c - b->ptr + 1);
	}

	b = p->basedir;
	buffer_copy_buffer(b, con->physical.path);
	for (c = b->ptr + buffer_string_length(b); c > b->ptr && *c != '/'; c--);

	if (*c == '/') {
		buffer_string_set_length(b, c - b->ptr + 1);
	}


	/* prepare variables
	 *   - cookie-based
	 *   - get-param-based
	 */
	return cache_parse_lua(srv, con, p, cml_file);
}

static handler_t mod_vhostdb_found (connection *con, vhostdb_entry *ve)
{
    /* fix virtual server and docroot */
    buffer_copy_buffer(con->server_name, ve->server_name);
    buffer_copy_buffer(con->physical.doc_root, ve->document_root);
    return HANDLER_GO_ON;
}

static data_unset *data_string_copy(const data_unset *s) {
	data_string *src = (data_string *)s;
	data_string *ds = data_string_init();

	buffer_copy_buffer(ds->key, src->key);
	buffer_copy_buffer(ds->value, src->value);
	ds->is_index_key = src->is_index_key;
	return (data_unset *)ds;
}

static data_unset *data_fastcgi_copy(const data_unset *s) {
	data_fastcgi *src = (data_fastcgi *)s;
	data_fastcgi *ds = data_fastcgi_init();

	buffer_copy_buffer(ds->key, src->key);
	buffer_copy_buffer(ds->host, src->host);
	ds->is_index_key = src->is_index_key;
	return (data_unset *)ds;
}

static void run_buffer_path_simplify(buffer *psrc, buffer *pdest, const char *in, size_t in_len, const char *out, size_t out_len) {
	buffer_copy_string_len(psrc, in, in_len);

	buffer_path_simplify(pdest, psrc);

	if (!buffer_is_equal_string(pdest, out, out_len)) {
		fprintf(stderr,
			"%s.%d: buffer_path_simplify('%s') failed: expected '%s', got '%s'\n",
			__FILE__,
			__LINE__,
			in,
			out,
			pdest->ptr ? pdest->ptr : "");
		fflush(stderr);
		abort();
	} else {
		if (psrc != pdest) buffer_copy_buffer(psrc, pdest);
		buffer_path_simplify(pdest, psrc);

		if (!buffer_is_equal_string(pdest, out, out_len)) {
			fprintf(stderr,
				"%s.%d: buffer_path_simplify('%s') failed - not idempotent: expected '%s', got '%s'\n",
				__FILE__,
				__LINE__,
				in,
				out,
				pdest->ptr ? pdest->ptr : "");
			fflush(stderr);
			abort();
		}
	}
}

static int log_buffer_prepare(buffer *b, server *srv, const char *filename, unsigned int line) {
	switch(srv->errorlog_mode) {
	case ERRORLOG_PIPE:
	case ERRORLOG_FILE:
	case ERRORLOG_FD:
		if (-1 == srv->errorlog_fd) return -1;
		/* cache the generated timestamp */
		if (srv->cur_ts != srv->last_generated_debug_ts) {
			buffer_string_prepare_copy(srv->ts_debug_str, 255);
			buffer_append_strftime(srv->ts_debug_str, "%Y-%m-%d %H:%M:%S", localtime(&(srv->cur_ts)));

			srv->last_generated_debug_ts = srv->cur_ts;
		}

		buffer_copy_buffer(b, srv->ts_debug_str);
		buffer_append_string_len(b, CONST_STR_LEN(": ("));
		break;
	case ERRORLOG_SYSLOG:
		/* syslog is generating its own timestamps */
		buffer_copy_string_len(b, CONST_STR_LEN("("));
		break;
	}

	buffer_append_string(b, filename);
	buffer_append_string_len(b, CONST_STR_LEN("."));
	buffer_append_int(b, line);
	buffer_append_string_len(b, CONST_STR_LEN(") "));

	return 0;
}

static int excludes_buffer_append(excludes_buffer *exb, buffer *string) {
	size_t i;
	const char *errptr;
	int erroff;

	if (!string) return -1;

	if (exb->used == exb->size) {
		exb->size += 4;

		exb->ptr = realloc(exb->ptr, exb->size * sizeof(*exb->ptr));

		for(i = exb->used; i < exb->size; i++) {
			exb->ptr[i] = calloc(1, sizeof(**exb->ptr));
		}
	}


	if (NULL == (exb->ptr[exb->used]->regex = pcre_compile(string->ptr, 0,
						    &errptr, &erroff, NULL))) {
		return -1;
	}

	exb->ptr[exb->used]->string = buffer_init();
	buffer_copy_buffer(exb->ptr[exb->used]->string, string);

	exb->used++;

	return 0;
}

static int connection_map_insert(connection_map *cm, connection *con, buffer *con_id) {
	connection_map_entry *cme;
	size_t i;

	if (cm->size == 0) {
		cm->size = 16;
		cm->ptr = malloc(cm->size * sizeof(*(cm->ptr)));
		for (i = 0; i < cm->size; i++) {
			cm->ptr[i] = NULL;
		}
	} else if (cm->used == cm->size) {
		cm->size += 16;
		cm->ptr = realloc(cm->ptr, cm->size * sizeof(*(cm->ptr)));
		for (i = cm->used; i < cm->size; i++) {
			cm->ptr[i] = NULL;
		}
	}

	if (cm->ptr[cm->used]) {
		/* is already alloced, just reuse it */
		cme = cm->ptr[cm->used];
	} else {
		cme = malloc(sizeof(*cme));
	}
	cme->con_id = buffer_init();
	buffer_copy_buffer(cme->con_id, con_id);
	cme->con = con;

	cm->ptr[cm->used++] = cme;

	return 0;
}

static handler_t mod_simple_vhost_docroot(server *srv, connection *con, void *p_data) {
	plugin_data *p = p_data;

	/*
	 * cache the last successfull translation from hostname (authority) to docroot
	 * - this saves us a stat() call
	 *
	 */

	mod_simple_vhost_patch_connection(srv, con, p);

	/* build_doc_root() requires a server_root; skip module if simple-vhost.server-root is not set
	 * or set to an empty string (especially don't cache any results!)
	 */
	if (buffer_string_is_empty(p->conf.server_root)) return HANDLER_GO_ON;

	if (!buffer_string_is_empty(p->conf.docroot_cache_key) &&
	    !buffer_string_is_empty(con->uri.authority) &&
	    buffer_is_equal(p->conf.docroot_cache_key, con->uri.authority)) {
		/* cache hit */
		buffer_copy_buffer(con->server_name,       p->conf.docroot_cache_servername);
		buffer_copy_buffer(con->physical.doc_root, p->conf.docroot_cache_value);
	} else {
		/* build document-root */
		if (buffer_string_is_empty(con->uri.authority) ||
		    build_doc_root(srv, con, p, p->doc_root, con->uri.authority)) {
			/* not found, fallback the default-host */
			if (0 == build_doc_root(srv, con, p,
					   p->doc_root,
					   p->conf.default_host)) {
				/* default host worked */
				buffer_copy_buffer(con->server_name, p->conf.default_host);
				buffer_copy_buffer(con->physical.doc_root, p->doc_root);
				/* do not cache default host */
			}
			return HANDLER_GO_ON;
		}

		/* found host */
		buffer_copy_buffer(con->server_name, con->uri.authority);
		buffer_copy_buffer(con->physical.doc_root, p->doc_root);

		/* copy to cache */
		buffer_copy_buffer(p->conf.docroot_cache_key,        con->uri.authority);
		buffer_copy_buffer(p->conf.docroot_cache_value,      p->doc_root);
		buffer_copy_buffer(p->conf.docroot_cache_servername, con->server_name);
	}

	return HANDLER_GO_ON;
}

static data_unset *data_array_copy(const data_unset *s) {
	data_array *src = (data_array *)s;
	data_array *ds = data_array_init();

	buffer_copy_buffer(ds->key, src->key);
	array_free(ds->value);
	ds->value = array_init_array(src->value);
	ds->is_index_key = src->is_index_key;
	return (data_unset *)ds;
}

static void http_list_directory_footer(server *srv, connection *con, plugin_data *p, buffer *out) {
	UNUSED(srv);

	buffer_append_string_len(out, CONST_STR_LEN(
		"</tbody>\n"
		"</table>\n"
		"</div>\n"
	));

	if (!buffer_string_is_empty(p->conf.show_readme)) {
		/* if we have a README file, display it in <pre class="readme"></pre> */

		buffer *rb = p->conf.show_readme;
		if (rb->ptr[0] != '/') {
			buffer_copy_buffer(p->tmp_buf,  con->physical.path);
			buffer_append_path_len(p->tmp_buf, CONST_BUF_LEN(p->conf.show_readme));
			rb = p->tmp_buf;
		}

		http_list_directory_include_file(out, con->conf.follow_symlink, rb, "readme", p->conf.encode_readme);
	}

	if(p->conf.auto_layout) {

		buffer_append_string_len(out, CONST_STR_LEN(
			"<div class=\"foot\">"
		));

		if (!buffer_string_is_empty(p->conf.set_footer)) {
			buffer_append_string_buffer(out, p->conf.set_footer);
		} else {
			buffer_append_string_buffer(out, con->conf.server_tag);
		}

		buffer_append_string_len(out, CONST_STR_LEN(
			"</div>\n"
		));

		if (!buffer_string_is_empty(p->conf.external_js)) {
			buffer_append_string_len(out, CONST_STR_LEN("<script type=\"text/javascript\" src=\""));
			buffer_append_string_buffer(out, p->conf.external_js);
			buffer_append_string_len(out, CONST_STR_LEN("\"></script>\n"));
		} else if (buffer_is_empty(p->conf.external_js)) {
			http_dirlist_append_js_table_resort(out, con);
		}

		buffer_append_string_len(out, CONST_STR_LEN(
			"</body>\n"
			"</html>\n"
		));
	}
}

static void http_list_directory_footer(server *srv, connection *con, plugin_data *p, buffer *out) {
	UNUSED(srv);

	buffer_append_string_len(out, CONST_STR_LEN(
		"</tbody>\n"
		"</table>\n"
		"</div>\n"
	));

	if (p->conf.show_readme) {
		stream s;
		/* if we have a README file, display it in <pre class="readme"></pre> */

		buffer_copy_buffer(p->tmp_buf,  con->physical.path);
		buffer_append_slash(p->tmp_buf);
		buffer_append_string_len(p->tmp_buf, CONST_STR_LEN("README.txt"));

		if (-1 != stream_open(&s, p->tmp_buf)) {
			if (p->conf.encode_readme) {
				buffer_append_string_len(out, CONST_STR_LEN("<pre class=\"readme\">"));
				buffer_append_string_encoded(out, s.start, s.size, ENCODING_MINIMAL_XML);
				buffer_append_string_len(out, CONST_STR_LEN("</pre>"));
			} else {
				buffer_append_string_len(out, s.start, s.size);
			}
		}
		stream_close(&s);
	}

	if(p->conf.auto_layout) {
		buffer_append_string_len(out, CONST_STR_LEN(
			"<div class=\"foot\">"
		));

		if (!buffer_string_is_empty(p->conf.set_footer)) {
			buffer_append_string_buffer(out, p->conf.set_footer);
		} else if (buffer_is_empty(con->conf.server_tag)) {
			buffer_append_string_len(out, CONST_STR_LEN(PACKAGE_DESC));
		} else {
			buffer_append_string_buffer(out, con->conf.server_tag);
		}

		buffer_append_string_len(out, CONST_STR_LEN(
			"</div>\n"
			"</body>\n"
			"</html>\n"
		));
	}
}

static int data_string_insert_dup(data_unset *dst, data_unset *src) {
	data_string *ds_dst = (data_string *)dst;
	data_string *ds_src = (data_string *)src;

	if (!buffer_is_empty(ds_dst->value)) {
		buffer_append_string_len(ds_dst->value, CONST_STR_LEN(", "));
		buffer_append_string_buffer(ds_dst->value, ds_src->value);
	} else {
		buffer_copy_buffer(ds_dst->value, ds_src->value);
	}

	src->free(src);

	return 0;
}

void chunkqueue_append_file(chunkqueue *cq, buffer *fn, off_t offset, off_t len) {
    chunk *c;

    if (0 == len) return;

    c = chunkqueue_get_unused_chunk(cq);

    c->type = FILE_CHUNK;

    buffer_copy_buffer(c->file.name, fn);
    c->file.start = offset;
    c->file.length = len;
    c->offset = 0;

    chunkqueue_append_chunk(cq, c);
}

static int build_doc_root(server *srv, connection *con, plugin_data *p, buffer *out, buffer *host) {
	stat_cache_entry *sce = NULL;
	force_assert(!buffer_string_is_empty(p->conf.server_root));

	buffer_string_prepare_copy(out, 127);
	buffer_copy_buffer(out, p->conf.server_root);

	if (!buffer_string_is_empty(host)) {
		/* a hostname has to start with a alpha-numerical character
		 * and must not contain a slash "/"
		 */
		char *dp;

		buffer_append_slash(out);

		if (NULL == (dp = strchr(host->ptr, ':'))) {
			buffer_append_string_buffer(out, host);
		} else {
			buffer_append_string_len(out, host->ptr, dp - host->ptr);
		}
	}
	buffer_append_slash(out);

	if (buffer_string_length(p->conf.document_root) > 1 && p->conf.document_root->ptr[0] == '/') {
		buffer_append_string_len(out, p->conf.document_root->ptr + 1, buffer_string_length(p->conf.document_root) - 1);
	} else {
		buffer_append_string_buffer(out, p->conf.document_root);
		buffer_append_slash(out);
	}

	if (HANDLER_ERROR == stat_cache_get_entry(srv, con, out, &sce)) {
		if (p->conf.debug) {
			log_error_write(srv, __FILE__, __LINE__, "sb",
					strerror(errno), out);
		}
		return -1;
	} else if (!S_ISDIR(sce->st.st_mode)) {
		return -1;
	}

	return 0;
}