thingspark example
Dependencies: MbedJSONValue mbed-http HTS221
source/main-https-chunked-request.cpp
- Committer:
- master_k1
- Date:
- 2019-12-29
- Revision:
- 39:9856f09a1333
- Parent:
- 31:66704f6f17c5
File content as of revision 39:9856f09a1333:
/** * This is an example of doing chunked requests, where you do not need to load the full request body * into memory. You do this by adding a callback to the `send` function of the HTTP/HTTPS request. */ #include "select-demo.h" #if DEMO == DEMO_HTTPS_CHUNKED_REQUEST #include "mbed.h" #include "mbed_trace.h" #include "https_request.h" #include "network-helper.h" /* List of trusted root CA certificates * currently one: Comodo, the CA for reqres.in * * To add more root certificates, just concatenate them. */ const char SSL_CA_PEM[] = "-----BEGIN CERTIFICATE-----\n" "MIICiTCCAg+gAwIBAgIQH0evqmIAcFBUTAGem2OZKjAKBggqhkjOPQQDAzCBhTEL\n" "MAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UE\n" "BxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQxKzApBgNVBAMT\n" "IkNPTU9ETyBFQ0MgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMDgwMzA2MDAw\n" "MDAwWhcNMzgwMTE4MjM1OTU5WjCBhTELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdy\n" "ZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgGA1UEChMRQ09N\n" "T0RPIENBIExpbWl0ZWQxKzApBgNVBAMTIkNPTU9ETyBFQ0MgQ2VydGlmaWNhdGlv\n" "biBBdXRob3JpdHkwdjAQBgcqhkjOPQIBBgUrgQQAIgNiAAQDR3svdcmCFYX7deSR\n" "FtSrYpn1PlILBs5BAH+X4QokPB0BBO490o0JlwzgdeT6+3eKKvUDYEs2ixYjFq0J\n" "cfRK9ChQtP6IHG4/bC8vCVlbpVsLM5niwz2J+Wos77LTBumjQjBAMB0GA1UdDgQW\n" "BBR1cacZSBm8nZ3qQUfflMRId5nTeTAOBgNVHQ8BAf8EBAMCAQYwDwYDVR0TAQH/\n" "BAUwAwEB/zAKBggqhkjOPQQDAwNoADBlAjEA7wNbeqy3eApyt4jf/7VGFAkK+qDm\n" "fQjGGoe9GKhzvSbKYAydzpmfz1wPMOG+FDHqAjAU9JM8SaczepBGR7NjfRObTrdv\n" "GDeAU/7dIOA1mjbRxwG55tzd8/8dLDoWV9mSOdY=\n" "-----END CERTIFICATE-----\n"; void dump_response(HttpResponse* res) { printf("Status: %d - %s\n", res->get_status_code(), res->get_status_message().c_str()); printf("Headers:\n"); for (size_t ix = 0; ix < res->get_headers_length(); ix++) { printf("\t%s: %s\n", res->get_headers_fields()[ix]->c_str(), res->get_headers_values()[ix]->c_str()); } printf("\nBody (%lu bytes):\n\n%s\n", res->get_body_length(), res->get_body_as_string().c_str()); } // Spread the message out over 3 different chunks const char * chunks[] = { "{\"message\":", "\"this is an example", " of chunked encoding\"}" }; int chunk_ix = 0; // Callback function, grab the next chunk and return it const void * get_chunk(uint32_t* out_size) { // If you don't have any data left, set out_size to 0 and return a null pointer if (chunk_ix == (sizeof(chunks) / sizeof(chunks[0]))) { *out_size = 0; return NULL; } const char *chunk = chunks[chunk_ix]; *out_size = strlen(chunk); chunk_ix++; return chunk; } int main() { NetworkInterface* network = connect_to_default_network_interface(); if (!network) { printf("Cannot connect to the network, see serial output\n"); return 1; } mbed_trace_init(); // This example also logs the raw request, you can do this by calling 'set_request_log_buffer' on the request uint8_t *request_buffer = (uint8_t*)calloc(2048, 1); // POST request to reqres.in { HttpsRequest* post_req = new HttpsRequest(network, SSL_CA_PEM, HTTP_POST, "https://reqres.in/api/users"); post_req->set_header("Content-Type", "application/json"); post_req->set_request_log_buffer(request_buffer, 2048); // If you pass a callback here, the Transfer-Encoding header is automatically set to chunked HttpResponse* post_res = post_req->send(&get_chunk); if (!post_res) { printf("HttpsRequest failed (error code %d)\n", post_req->get_error()); return 1; } // Log the raw request that went over the line (if you decode the hex you can see the chunked parts) // e.g. in Node.js (take the output from below): // '50 4f 53 54 20'.split(' ').map(c=>parseInt(c,16)).map(c=>String.fromCharCode(c)).join('') printf("\n----- Request buffer -----\n"); for (size_t ix = 0; ix < post_req->get_request_log_buffer_length(); ix++) { printf("%02x ", request_buffer[ix]); } printf("\n"); printf("\n----- HTTPS POST response -----\n"); dump_response(post_res); delete post_req; } wait(osWaitForever); } #endif