k jm / Mbed OS thingspark example

thingspark example

Dependencies:   MbedJSONValue mbed-http HTS221

source/main-https-chunked-request.cpp@39:9856f09a1333, 2019-12-29 (annotated)

Committer:
master_k1
Date:
Sun Dec 29 03:14:52 2019 +0000
Revision:
39:9856f09a1333
Parent:
31:66704f6f17c5 
change api key

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Jan Jongboom 25:a8be9f3a530c 1 /**
Jan Jongboom 25:a8be9f3a530c 2 * This is an example of doing chunked requests, where you do not need to load the full request body
Jan Jongboom 25:a8be9f3a530c 3 * into memory. You do this by adding a callback to the `send` function of the HTTP/HTTPS request.
Jan Jongboom 25:a8be9f3a530c 4 */
Jan Jongboom 25:a8be9f3a530c 5
Jan Jongboom 25:a8be9f3a530c 6 #include "select-demo.h"
Jan Jongboom 25:a8be9f3a530c 7
Jan Jongboom 25:a8be9f3a530c 8 #if DEMO == DEMO_HTTPS_CHUNKED_REQUEST
Jan Jongboom 25:a8be9f3a530c 9
Jan Jongboom 25:a8be9f3a530c 10 #include "mbed.h"
Jan Jongboom 31:66704f6f17c5 11 #include "mbed_trace.h"
Jan Jongboom 25:a8be9f3a530c 12 #include "https_request.h"
Jan Jongboom 30:4825e4f38844 13 #include "network-helper.h"
Jan Jongboom 25:a8be9f3a530c 14
Jan Jongboom 25:a8be9f3a530c 15 /* List of trusted root CA certificates
Jan Jongboom 25:a8be9f3a530c 16 * currently one: Comodo, the CA for reqres.in
Jan Jongboom 25:a8be9f3a530c 17 *
Jan Jongboom 25:a8be9f3a530c 18 * To add more root certificates, just concatenate them.
Jan Jongboom 25:a8be9f3a530c 19 */
Jan Jongboom 25:a8be9f3a530c 20 const char SSL_CA_PEM[] = "-----BEGIN CERTIFICATE-----\n"
Jan Jongboom 25:a8be9f3a530c 21 "MIICiTCCAg+gAwIBAgIQH0evqmIAcFBUTAGem2OZKjAKBggqhkjOPQQDAzCBhTEL\n"
Jan Jongboom 25:a8be9f3a530c 22 "MAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UE\n"
Jan Jongboom 25:a8be9f3a530c 23 "BxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQxKzApBgNVBAMT\n"
Jan Jongboom 25:a8be9f3a530c 24 "IkNPTU9ETyBFQ0MgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMDgwMzA2MDAw\n"
Jan Jongboom 25:a8be9f3a530c 25 "MDAwWhcNMzgwMTE4MjM1OTU5WjCBhTELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdy\n"
Jan Jongboom 25:a8be9f3a530c 26 "ZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgGA1UEChMRQ09N\n"
Jan Jongboom 25:a8be9f3a530c 27 "T0RPIENBIExpbWl0ZWQxKzApBgNVBAMTIkNPTU9ETyBFQ0MgQ2VydGlmaWNhdGlv\n"
Jan Jongboom 25:a8be9f3a530c 28 "biBBdXRob3JpdHkwdjAQBgcqhkjOPQIBBgUrgQQAIgNiAAQDR3svdcmCFYX7deSR\n"
Jan Jongboom 25:a8be9f3a530c 29 "FtSrYpn1PlILBs5BAH+X4QokPB0BBO490o0JlwzgdeT6+3eKKvUDYEs2ixYjFq0J\n"
Jan Jongboom 25:a8be9f3a530c 30 "cfRK9ChQtP6IHG4/bC8vCVlbpVsLM5niwz2J+Wos77LTBumjQjBAMB0GA1UdDgQW\n"
Jan Jongboom 25:a8be9f3a530c 31 "BBR1cacZSBm8nZ3qQUfflMRId5nTeTAOBgNVHQ8BAf8EBAMCAQYwDwYDVR0TAQH/\n"
Jan Jongboom 25:a8be9f3a530c 32 "BAUwAwEB/zAKBggqhkjOPQQDAwNoADBlAjEA7wNbeqy3eApyt4jf/7VGFAkK+qDm\n"
Jan Jongboom 25:a8be9f3a530c 33 "fQjGGoe9GKhzvSbKYAydzpmfz1wPMOG+FDHqAjAU9JM8SaczepBGR7NjfRObTrdv\n"
Jan Jongboom 25:a8be9f3a530c 34 "GDeAU/7dIOA1mjbRxwG55tzd8/8dLDoWV9mSOdY=\n"
Jan Jongboom 25:a8be9f3a530c 35 "-----END CERTIFICATE-----\n";
Jan Jongboom 25:a8be9f3a530c 36
Jan Jongboom 25:a8be9f3a530c 37 void dump_response(HttpResponse* res) {
Jan Jongboom 31:66704f6f17c5 38 printf("Status: %d - %s\n", res->get_status_code(), res->get_status_message().c_str());
Jan Jongboom 25:a8be9f3a530c 39
Jan Jongboom 31:66704f6f17c5 40 printf("Headers:\n");
Jan Jongboom 25:a8be9f3a530c 41 for (size_t ix = 0; ix < res->get_headers_length(); ix++) {
Jan Jongboom 31:66704f6f17c5 42 printf("\t%s: %s\n", res->get_headers_fields()[ix]->c_str(), res->get_headers_values()[ix]->c_str());
Jan Jongboom 25:a8be9f3a530c 43 }
Jan Jongboom 31:66704f6f17c5 44 printf("\nBody (%lu bytes):\n\n%s\n", res->get_body_length(), res->get_body_as_string().c_str());
Jan Jongboom 25:a8be9f3a530c 45 }
Jan Jongboom 25:a8be9f3a530c 46
Jan Jongboom 25:a8be9f3a530c 47 // Spread the message out over 3 different chunks
Jan Jongboom 25:a8be9f3a530c 48 const char * chunks[] = {
Jan Jongboom 25:a8be9f3a530c 49 "{\"message\":",
Jan Jongboom 25:a8be9f3a530c 50 "\"this is an example",
Jan Jongboom 25:a8be9f3a530c 51 " of chunked encoding\"}"
Jan Jongboom 25:a8be9f3a530c 52 };
Jan Jongboom 25:a8be9f3a530c 53
Jan Jongboom 25:a8be9f3a530c 54 int chunk_ix = 0;
Jan Jongboom 25:a8be9f3a530c 55
Jan Jongboom 25:a8be9f3a530c 56 // Callback function, grab the next chunk and return it
Jan Jongboom 31:66704f6f17c5 57 const void * get_chunk(uint32_t* out_size) {
Jan Jongboom 25:a8be9f3a530c 58 // If you don't have any data left, set out_size to 0 and return a null pointer
Jan Jongboom 25:a8be9f3a530c 59 if (chunk_ix == (sizeof(chunks) / sizeof(chunks[0]))) {
Jan Jongboom 25:a8be9f3a530c 60 *out_size = 0;
Jan Jongboom 25:a8be9f3a530c 61 return NULL;
Jan Jongboom 25:a8be9f3a530c 62 }
Jan Jongboom 25:a8be9f3a530c 63 const char *chunk = chunks[chunk_ix];
Jan Jongboom 25:a8be9f3a530c 64 *out_size = strlen(chunk);
Jan Jongboom 25:a8be9f3a530c 65 chunk_ix++;
Jan Jongboom 25:a8be9f3a530c 66
Jan Jongboom 25:a8be9f3a530c 67 return chunk;
Jan Jongboom 25:a8be9f3a530c 68 }
Jan Jongboom 25:a8be9f3a530c 69
Jan Jongboom 25:a8be9f3a530c 70 int main() {
Jan Jongboom 30:4825e4f38844 71 NetworkInterface* network = connect_to_default_network_interface();
Jan Jongboom 25:a8be9f3a530c 72 if (!network) {
Jan Jongboom 30:4825e4f38844 73 printf("Cannot connect to the network, see serial output\n");
Jan Jongboom 25:a8be9f3a530c 74 return 1;
Jan Jongboom 25:a8be9f3a530c 75 }
Jan Jongboom 25:a8be9f3a530c 76
Jan Jongboom 31:66704f6f17c5 77 mbed_trace_init();
Jan Jongboom 31:66704f6f17c5 78
Jan Jongboom 31:66704f6f17c5 79 // This example also logs the raw request, you can do this by calling 'set_request_log_buffer' on the request
Jan Jongboom 31:66704f6f17c5 80 uint8_t *request_buffer = (uint8_t*)calloc(2048, 1);
Jan Jongboom 31:66704f6f17c5 81
Jan Jongboom 31:66704f6f17c5 82 // POST request to reqres.in
Jan Jongboom 25:a8be9f3a530c 83 {
Jan Jongboom 25:a8be9f3a530c 84 HttpsRequest* post_req = new HttpsRequest(network, SSL_CA_PEM, HTTP_POST, "https://reqres.in/api/users");
Jan Jongboom 25:a8be9f3a530c 85 post_req->set_header("Content-Type", "application/json");
Jan Jongboom 31:66704f6f17c5 86 post_req->set_request_log_buffer(request_buffer, 2048);
Jan Jongboom 25:a8be9f3a530c 87
Jan Jongboom 25:a8be9f3a530c 88 // If you pass a callback here, the Transfer-Encoding header is automatically set to chunked
Jan Jongboom 25:a8be9f3a530c 89 HttpResponse* post_res = post_req->send(&get_chunk);
Jan Jongboom 25:a8be9f3a530c 90 if (!post_res) {
Jan Jongboom 25:a8be9f3a530c 91 printf("HttpsRequest failed (error code %d)\n", post_req->get_error());
Jan Jongboom 25:a8be9f3a530c 92 return 1;
Jan Jongboom 25:a8be9f3a530c 93 }
Jan Jongboom 25:a8be9f3a530c 94
Jan Jongboom 31:66704f6f17c5 95 // Log the raw request that went over the line (if you decode the hex you can see the chunked parts)
Jan Jongboom 31:66704f6f17c5 96 // e.g. in Node.js (take the output from below):
Jan Jongboom 31:66704f6f17c5 97 // '50 4f 53 54 20'.split(' ').map(c=>parseInt(c,16)).map(c=>String.fromCharCode(c)).join('')
Jan Jongboom 31:66704f6f17c5 98 printf("\n----- Request buffer -----\n");
Jan Jongboom 31:66704f6f17c5 99 for (size_t ix = 0; ix < post_req->get_request_log_buffer_length(); ix++) {
Jan Jongboom 31:66704f6f17c5 100 printf("%02x ", request_buffer[ix]);
Jan Jongboom 31:66704f6f17c5 101 }
Jan Jongboom 31:66704f6f17c5 102 printf("\n");
Jan Jongboom 31:66704f6f17c5 103
Jan Jongboom 25:a8be9f3a530c 104 printf("\n----- HTTPS POST response -----\n");
Jan Jongboom 25:a8be9f3a530c 105 dump_response(post_res);
Jan Jongboom 25:a8be9f3a530c 106
Jan Jongboom 25:a8be9f3a530c 107 delete post_req;
Jan Jongboom 25:a8be9f3a530c 108 }
Jan Jongboom 25:a8be9f3a530c 109
Jan Jongboom 25:a8be9f3a530c 110 wait(osWaitForever);
Jan Jongboom 25:a8be9f3a530c 111 }
Jan Jongboom 25:a8be9f3a530c 112
Jan Jongboom 25:a8be9f3a530c 113 #endif