Boon Boon / Mbed OS lpc1768_appboard_http_thingsboard

simple http request (temperature data) from mbed lpc1768 with application board to thingsboard device/dashboard

Dependencies:   LM75B mbed-http

Fork of http-example by sandbox

source/main-http-socket-reuse.cpp@31:cba9d9dea21a, 2018-06-29 (annotated)

Committer:
daklowprofile
Date:
Fri Jun 29 03:19:58 2018 +0000
Revision:
31:cba9d9dea21a
don't change anything

Who changed what in which revision?

UserRevisionLine numberNew contents of line
daklowprofile 31:cba9d9dea21a 1 #include "select-demo.h"
daklowprofile 31:cba9d9dea21a 2
daklowprofile 31:cba9d9dea21a 3 #if DEMO == DEMO_HTTP_SOCKET_REUSE
daklowprofile 31:cba9d9dea21a 4
daklowprofile 31:cba9d9dea21a 5 #include "mbed.h"
daklowprofile 31:cba9d9dea21a 6 #include "easy-connect.h"
daklowprofile 31:cba9d9dea21a 7 #include "http_request.h"
daklowprofile 31:cba9d9dea21a 8
daklowprofile 31:cba9d9dea21a 9 void dump_response(HttpResponse* res) {
daklowprofile 31:cba9d9dea21a 10 printf("Status: %d - %s\n", res->get_status_code(), res->get_status_message().c_str());
daklowprofile 31:cba9d9dea21a 11
daklowprofile 31:cba9d9dea21a 12 printf("Headers:\n");
daklowprofile 31:cba9d9dea21a 13 for (size_t ix = 0; ix < res->get_headers_length(); ix++) {
daklowprofile 31:cba9d9dea21a 14 printf("\t%s: %s\n", res->get_headers_fields()[ix]->c_str(), res->get_headers_values()[ix]->c_str());
daklowprofile 31:cba9d9dea21a 15 }
daklowprofile 31:cba9d9dea21a 16 printf("\nBody (%d bytes):\n\n%s\n", res->get_body_length(), res->get_body_as_string().c_str());
daklowprofile 31:cba9d9dea21a 17 }
daklowprofile 31:cba9d9dea21a 18
daklowprofile 31:cba9d9dea21a 19 int main() {
daklowprofile 31:cba9d9dea21a 20 // Connect to the network (see mbed_app.json for the connectivity method used)
daklowprofile 31:cba9d9dea21a 21 NetworkInterface* network = easy_connect(true);
daklowprofile 31:cba9d9dea21a 22 if (!network) {
daklowprofile 31:cba9d9dea21a 23 printf("Cannot connect to the network, see serial output");
daklowprofile 31:cba9d9dea21a 24 return 1;
daklowprofile 31:cba9d9dea21a 25 }
daklowprofile 31:cba9d9dea21a 26
daklowprofile 31:cba9d9dea21a 27 // Create a TCP socket
daklowprofile 31:cba9d9dea21a 28 printf("\n----- Setting up TCP connection -----\n");
daklowprofile 31:cba9d9dea21a 29
daklowprofile 31:cba9d9dea21a 30 TCPSocket* socket = new TCPSocket();
daklowprofile 31:cba9d9dea21a 31 nsapi_error_t open_result = socket->open(network);
daklowprofile 31:cba9d9dea21a 32 if (open_result != 0) {
daklowprofile 31:cba9d9dea21a 33 printf("Opening TCPSocket failed... %d\n", open_result);
daklowprofile 31:cba9d9dea21a 34 return 1;
daklowprofile 31:cba9d9dea21a 35 }
daklowprofile 31:cba9d9dea21a 36
daklowprofile 31:cba9d9dea21a 37 nsapi_error_t connect_result = socket->connect("httpbin.org", 80);
daklowprofile 31:cba9d9dea21a 38 if (connect_result != 0) {
daklowprofile 31:cba9d9dea21a 39 printf("Connecting over TCPSocket failed... %d\n", connect_result);
daklowprofile 31:cba9d9dea21a 40 return 1;
daklowprofile 31:cba9d9dea21a 41 }
daklowprofile 31:cba9d9dea21a 42
daklowprofile 31:cba9d9dea21a 43 printf("Connected over TCP to httpbin.org:80\n");
daklowprofile 31:cba9d9dea21a 44
daklowprofile 31:cba9d9dea21a 45 // Do a GET request to httpbin.org
daklowprofile 31:cba9d9dea21a 46 {
daklowprofile 31:cba9d9dea21a 47 HttpRequest* get_req = new HttpRequest(socket, HTTP_GET, "http://httpbin.org/status/418");
daklowprofile 31:cba9d9dea21a 48
daklowprofile 31:cba9d9dea21a 49 // By default the body is automatically parsed and stored in a string, this is memory heavy.
daklowprofile 31:cba9d9dea21a 50 // To receive chunked response, pass in a callback as third parameter to 'send'.
daklowprofile 31:cba9d9dea21a 51 HttpResponse* get_res = get_req->send();
daklowprofile 31:cba9d9dea21a 52 if (!get_res) {
daklowprofile 31:cba9d9dea21a 53 printf("HttpRequest failed (error code %d)\n", get_req->get_error());
daklowprofile 31:cba9d9dea21a 54 return 1;
daklowprofile 31:cba9d9dea21a 55 }
daklowprofile 31:cba9d9dea21a 56
daklowprofile 31:cba9d9dea21a 57 printf("\n----- HTTP GET response -----\n");
daklowprofile 31:cba9d9dea21a 58 dump_response(get_res);
daklowprofile 31:cba9d9dea21a 59
daklowprofile 31:cba9d9dea21a 60 delete get_req;
daklowprofile 31:cba9d9dea21a 61 }
daklowprofile 31:cba9d9dea21a 62
daklowprofile 31:cba9d9dea21a 63 // POST request to httpbin.org
daklowprofile 31:cba9d9dea21a 64 {
daklowprofile 31:cba9d9dea21a 65 HttpRequest* post_req = new HttpRequest(socket, HTTP_POST, "http://httpbin.org/post");
daklowprofile 31:cba9d9dea21a 66 post_req->set_header("Content-Type", "application/json");
daklowprofile 31:cba9d9dea21a 67
daklowprofile 31:cba9d9dea21a 68 const char body[] = "{\"hello\":\"world\"}";
daklowprofile 31:cba9d9dea21a 69
daklowprofile 31:cba9d9dea21a 70 HttpResponse* post_res = post_req->send(body, strlen(body));
daklowprofile 31:cba9d9dea21a 71 if (!post_res) {
daklowprofile 31:cba9d9dea21a 72 printf("HttpRequest failed (error code %d)\n", post_req->get_error());
daklowprofile 31:cba9d9dea21a 73 return 1;
daklowprofile 31:cba9d9dea21a 74 }
daklowprofile 31:cba9d9dea21a 75
daklowprofile 31:cba9d9dea21a 76 printf("\n----- HTTP POST response -----\n");
daklowprofile 31:cba9d9dea21a 77 dump_response(post_res);
daklowprofile 31:cba9d9dea21a 78
daklowprofile 31:cba9d9dea21a 79 delete post_req;
daklowprofile 31:cba9d9dea21a 80 }
daklowprofile 31:cba9d9dea21a 81
daklowprofile 31:cba9d9dea21a 82 delete socket;
daklowprofile 31:cba9d9dea21a 83
daklowprofile 31:cba9d9dea21a 84 wait(osWaitForever);
daklowprofile 31:cba9d9dea21a 85 }
daklowprofile 31:cba9d9dea21a 86
daklowprofile 31:cba9d9dea21a 87 #endif