add example

RTL00_SDKV35a/component/common/example/http_download/example_http_download.c

@@ -0,0 +1,116 @@
+#include <platform_opts.h>
+
+#if defined(CONFIG_EXAMPLE_HTTP_DOWNLOAD) && (CONFIG_EXAMPLE_HTTP_DOWNLOAD == 1)
+#include <FreeRTOS.h>
+#include <task.h>
+#include <platform/platform_stdlib.h>
+#include <lwip/sockets.h>
+#include <lwip/netdb.h>
+
+#define SERVER_HOST    "176.34.62.248"
+#define SERVER_PORT    80
+#define RESOURCE       "/repository/IOT/Project_Cloud_A.bin"
+#define BUFFER_SIZE    2048
+#define RECV_TO        5000	// ms
+
+static void example_http_download_thread(void *param)
+{
+	int server_fd = -1, ret;
+	struct sockaddr_in server_addr;
+	struct hostent *server_host;
+
+	// Delay to wait for IP by DHCP
+	vTaskDelay(10000);
+	printf("\nExample: HTTP download\n");
+
+	if((server_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+		printf("ERROR: socket\n");
+		goto exit;
+	}
+	else {
+		int recv_timeout_ms = RECV_TO;
+#if defined(LWIP_SO_SNDRCVTIMEO_NONSTANDARD) && (LWIP_SO_SNDRCVTIMEO_NONSTANDARD == 0)	// lwip 1.5.0
+		struct timeval recv_timeout;
+		recv_timeout.tv_sec = recv_timeout_ms / 1000;
+		recv_timeout.tv_usec = recv_timeout_ms % 1000 * 1000;
+		setsockopt(server_fd, SOL_SOCKET, SO_RCVTIMEO, &recv_timeout, sizeof(recv_timeout));
+#else	// lwip 1.4.1
+		setsockopt(server_fd, SOL_SOCKET, SO_RCVTIMEO, &recv_timeout_ms, sizeof(recv_timeout_ms));
+#endif
+	}
+
+	server_addr.sin_family = AF_INET;
+	server_addr.sin_port = htons(SERVER_PORT);
+
+	// Support SERVER_HOST in IP or domain name
+	server_host = gethostbyname(SERVER_HOST);
+	memcpy((void *) &server_addr.sin_addr, (void *) server_host->h_addr, server_host->h_length);
+
+	if(connect(server_fd, (struct sockaddr *) &server_addr, sizeof(server_addr)) == 0) {
+		unsigned char buf[BUFFER_SIZE + 1];
+		int pos = 0, read_size = 0, resource_size = 0, content_len = 0, header_removed = 0;
+
+		sprintf(buf, "GET %s HTTP/1.1\r\nHost: %s\r\n\r\n", RESOURCE, SERVER_HOST);
+		write(server_fd, buf, strlen(buf));
+
+		while((read_size = read(server_fd, buf + pos, BUFFER_SIZE - pos)) > 0) {
+			if(header_removed == 0) {
+				char *header = NULL;
+
+				pos += read_size;
+				buf[pos] = 0;
+				header = strstr(buf, "\r\n\r\n");
+
+				if(header) {
+					char *body, *content_len_pos;
+
+					body = header + strlen("\r\n\r\n");
+					*(body - 2) = 0;
+					header_removed = 1;
+					printf("\nHTTP Header: %s\n", buf);
+
+					// Remove header size to get first read size of data from body head
+					read_size = pos - ((unsigned char *) body - buf);
+					pos = 0;
+
+					content_len_pos = strstr(buf, "Content-Length: ");
+					if(content_len_pos) {
+						content_len_pos += strlen("Content-Length: ");
+						*(char*)(strstr(content_len_pos, "\r\n")) = 0;
+						content_len = atoi(content_len_pos);
+					}
+				}
+				else {
+					if(pos >= BUFFER_SIZE){
+						printf("ERROR: HTTP header\n");
+						goto exit;
+					}
+
+					continue;
+				}
+			}
+
+			printf("read resource %d bytes\n", read_size);
+			resource_size += read_size;
+		}
+
+		printf("exit read. ret = %d\n", read_size);
+		printf("http content-length = %d bytes, download resource size = %d bytes\n", content_len, resource_size);
+	}
+	else {
+		printf("ERROR: connect\n");
+	}
+
+exit:
+	if(server_fd >= 0)
+		close(server_fd);
+
+	vTaskDelete(NULL);
+}
+
+void example_http_download(void)
+{
+	if(xTaskCreate(example_http_download_thread, ((const char*)"example_http_download_thread"), 2048, NULL, tskIDLE_PRIORITY + 1, NULL) != pdPASS)
+		printf("\n\r%s xTaskCreate failed", __FUNCTION__);
+}
+#endif //CONFIG_EXAMPLE_HTTP_DOWNLOAD

RTL00_SDKV35a/component/common/example/http_download/example_http_download.h

@@ -0,0 +1,6 @@
+#ifndef EXAMPLE_HTTP_DOWNLOAD_H
+#define EXAMPLE_HTTP_DOWNLOAD_H
+
+void example_http_download(void);
+
+#endif /* EXAMPLE_HTTP_DOWNLOAD_H */

RTL00_SDKV35a/component/common/example/http_download/readme.txt

@@ -0,0 +1,15 @@
+HTTP DOWNLOAD EXAMPLE
+
+Description:
+Download file from Web server via http.
+
+Configuration:
+Modify SERVER_HOST, SERVER_PORT and RESOURCE in example_http_download.c based on your HTTP server.
+
+[platform_opts.h]
+	#define CONFIG_EXAMPLE_HTTP_DOWNLOAD    1
+
+Execution:
+Can make automatical Wi-Fi connection when booting by using wlan fast connect example.
+A http download example thread will be started automatically when booting.
+