This example shows how to use the TLS_cyassl library. It connects to twitter.com and downloads a webpage.
Dependencies: EthernetInterface7 HTTPSClient_cyassl TLS_cyassl mbed-rtos mbed
Fork of HTTPSClientExample2 by
Once you imported this program, you need to load the right certificate. To do so, open the file cert.h in the TLS_cyassl library then, replace the content by this :
root certificate of twitter
static const uint8_t root_cert[] = { 0x30, 0x82, 0x04, 0xD3, 0x30, 0x82, 0x03, 0xBB, 0xA0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x10, 0x18, 0xDA, 0xD1, 0x9E, 0x26, 0x7D, 0xE8, 0xBB, 0x4A, 0x21, 0x58, 0xCD, 0xCC, 0x6B, 0x3B, 0x4A, 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x05, 0x05, 0x00, 0x30, 0x81, 0xCA, 0x31, 0x0B, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31, 0x17, 0x30, 0x15, 0x06, 0x03, 0x55, 0x04, 0x0A, 0x13, 0x0E, 0x56, 0x65, 0x72, 0x69, 0x53, 0x69, 0x67, 0x6E, 0x2C, 0x20, 0x49, 0x6E, 0x63, 0x2E, 0x31, 0x1F, 0x30, 0x1D, 0x06, 0x03, 0x55, 0x04, 0x0B, 0x13, 0x16, 0x56, 0x65, 0x72, 0x69, 0x53, 0x69, 0x67, 0x6E, 0x20, 0x54, 0x72, 0x75, 0x73, 0x74, 0x20, 0x4E, 0x65, 0x74, 0x77, 0x6F, 0x72, 0x6B, 0x31, 0x3A, 0x30, 0x38, 0x06, 0x03, 0x55, 0x04, 0x0B, 0x13, 0x31, 0x28, 0x63, 0x29, 0x20, 0x32, 0x30, 0x30, 0x36, 0x20, 0x56, 0x65, 0x72, 0x69, 0x53, 0x69, 0x67, 0x6E, 0x2C, 0x20, 0x49, 0x6E, 0x63, 0x2E, 0x20, 0x2D, 0x20, 0x46, 0x6F, 0x72, 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0x10, 0xB5, 0x95, 0xFC, 0xE7, 0x42, 0x05, 0x32, 0xDB, 0xCE, 0x9D, 0x51, 0x5E, 0x28, 0xB6, 0x9E, 0x85, 0xD3, 0x5B, 0xEF, 0xA5, 0x7D, 0x45, 0x40, 0x72, 0x8E, 0xB7, 0x0E, 0x6B, 0x0E, 0x06, 0xFB, 0x33, 0x35, 0x48, 0x71, 0xB8, 0x9D, 0x27, 0x8B, 0xC4, 0x65, 0x5F, 0x0D, 0x86, 0x76, 0x9C, 0x44, 0x7A, 0xF6, 0x95, 0x5C, 0xF6, 0x5D, 0x32, 0x08, 0x33, 0xA4, 0x54, 0xB6, 0x18, 0x3F, 0x68, 0x5C, 0xF2, 0x42, 0x4A, 0x85, 0x38, 0x54, 0x83, 0x5F, 0xD1, 0xE8, 0x2C, 0xF2, 0xAC, 0x11, 0xD6, 0xA8, 0xED, 0x63, 0x6A }; static const uint32_t root_cert_len = sizeof(root_cert);
Revision 2:659d693a1a21, committed 2013-09-18
- Comitter:
- feb11
- Date:
- Wed Sep 18 12:41:31 2013 +0000
- Parent:
- 1:db560c045c62
- Commit message:
- moved HTTPS files to new library
Changed in this revision
diff -r db560c045c62 -r 659d693a1a21 HTTPHeader.cpp --- a/HTTPHeader.cpp Mon Sep 16 09:59:26 2013 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,31 +0,0 @@ -#include "HTTPHeader.h" - -HTTPHeader::HTTPHeader(HTTPStatus status): - _status(status), - _bodyLength(0) -{ -} - -std::string HTTPHeader::getRequest(const std::string &path, const std::string &host, const int port) -{ - - std::string request = "GET "; - request += path; - request += " HTTP/1.0\r\nHost: "; - request += host; - request += ":"; - request += port; - request += "\r\n\r\n"; - return request; -} - -HTTPStatus HTTPHeader::getStatus() const -{ - return _status; -} - -int HTTPHeader::getBodyLength() const -{ - return _bodyLength; -} -
diff -r db560c045c62 -r 659d693a1a21 HTTPHeader.h --- a/HTTPHeader.h Mon Sep 16 09:59:26 2013 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,28 +0,0 @@ -#ifndef HTTP_HEADER_H -#define HTTP_HEADER_H - -#include <string> -#include "HTTPStatus.h" - -class HTTPSClient; - -class HTTPHeader -{ -public : - - friend class HTTPSClient; - - HTTPHeader(HTTPStatus status = HTTP_INVALID); - - static std::string getRequest(const std::string &path, const std::string &host, const int port); - - HTTPStatus getStatus() const; - int getBodyLength() const; -private : - - HTTPStatus _status; - int _bodyLength; -}; - -#endif -
diff -r db560c045c62 -r 659d693a1a21 HTTPSClient.cpp --- a/HTTPSClient.cpp Mon Sep 16 09:59:26 2013 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,88 +0,0 @@ -#include "HTTPSClient.h" -#include "HTTPHeader.h" -#include <stdio.h> -#include <string.h> - -HTTPSClient::HTTPSClient(): - _con() -{ -} - -bool HTTPSClient::connect(const std::string& host) -{ - if(_con.is_connected()) - return false; - - return _con.connect(host.c_str()); -} - -std::string HTTPSClient::readLine() -{ - std::string line; - char c; - _con.receive(&c, 1); - while(c != '\r') { - line += c; - _con.receive(&c, 1); - } - _con.receive(&c, 1); // skip \n - return line; -} - -HTTPHeader HTTPSClient::readHeader() -{ - HTTPHeader hdr; - std::string line = readLine(); - sscanf(line.c_str(), "HTTP/1.%*d %d OK", &hdr._status); - do { - if(!line.compare(0,strlen("Content-Length"), "Content-Length")) - sscanf(line.c_str(), "Content-Length: %d", &hdr._bodyLength); - else if(!line.compare(0,strlen("content-length"), "content-length")) - sscanf(line.c_str(), "content-length: %d", &hdr._bodyLength); - line = readLine(); - } while(line.size()); - return hdr; -} - -int HTTPSClient::get(const std::string& path, HTTPHeader *hdr) -{ - if(!_con.is_connected()) - return -1; - - const std::string &request = HTTPHeader::getRequest(path, _con.get_address(), 443); - - if(_con.send_all((char*)request.c_str(), request.size()+1) != request.size()+1) - return -1; - - *hdr = readHeader(); - return hdr->_status == HTTP_OK ? 0 : -1; -} - -int HTTPSClient::get(const std::string& path, HTTPHeader *hdr, char *data, int length) -{ - if(!_con.is_connected()) - return -1; - - if(hdr != NULL) { - const std::string &request = HTTPHeader::getRequest(path, _con.get_address(), 443); - if(_con.send_all((char*)request.c_str(), request.size()+1) != request.size()+1) - return -1; - *hdr = readHeader(); - if(hdr->_status != HTTP_OK) - return -1; - - if(hdr->_bodyLength > 0) - return _con.receive(data, hdr->_bodyLength > length ? length : hdr->_bodyLength); - - return 0; - } else - return _con.receive(data, length); -} - -bool HTTPSClient::disconnect() -{ - if(!_con.is_connected()) - return true; - - return _con.close() == 0; -}
diff -r db560c045c62 -r 659d693a1a21 HTTPSClient.h --- a/HTTPSClient.h Mon Sep 16 09:59:26 2013 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,87 +0,0 @@ -#ifndef HTTPS_CLIENT_H -#define HTTPS_CLIENT_H - -#include <string> -#include "TLSConnection.h" -#include "HTTPHeader.h" - - -/** Simple wrapper of TLS library to send GET request to - a server and receive some web pages. -*/ -class HTTPSClient -{ -public : - - HTTPSClient(); - - /** Connnect to the given host. - - \param host A valid hostname (e.g. "mbed.org") - \return True if the connection was established with - success, false otherwise. - - \note If the client is already connected, it returns false. - */ - bool connect(const std::string& host); - - /** Send a GET request to the host. - - \param path - \param hdr A pointer to an HTTPHeader object. - \return Returns 0 if the request was sent with success, - or -1 if an error occured. - */ - int get(const std::string& path, HTTPHeader *hdr); - - /** Send a get request and reads (partially) the body - - \param path - \param hdr A pointer to an HTTPHeader object. - \param data A pointer to some buffer - \param length Maximum number of bytes to read - \return Number of bytes stored in data in range 0..length, or -1 - if an error occured. - - \note To check whether this request is sent with success, you must check - the status of the HTTPHeader and the value of the integer returned by this - function. - - Example: - @code - // Assuming that an HTTPSClient object c is connected to a host - HTTPHeader hdr; - char buffer[256]; - int n = c.get("/", &hdr, buffer, 256); - if(n > 0 && hdr.getStatus() == HTTP_OK) // GET request sent with success - { - // do some stuff here.. - } - else - printf("Failed to send get request\n"); - @endcode - - - \note If hdr is null, this function does not send anything and directly writes - bytes in data. This is particularly useful if you expect large answers (such as - webpages) from the host. - */ - int get(const std::string& path, HTTPHeader *hdr, char *data, int length); - - /** Disconnect from host - - \return True if the client disconnected with success, false otherwise. - */ - bool disconnect(); - -private : - - std::string readLine(); - HTTPHeader readHeader(); - - TLSConnection _con; - -}; - -#endif -
diff -r db560c045c62 -r 659d693a1a21 HTTPSClient_cyassl.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/HTTPSClient_cyassl.lib Wed Sep 18 12:41:31 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/feb11/code/HTTPSClient_cyassl/#1abc65a0f50b
diff -r db560c045c62 -r 659d693a1a21 HTTPStatus.h --- a/HTTPStatus.h Mon Sep 16 09:59:26 2013 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,17 +0,0 @@ -#ifndef HTTP_STATUS_H -#define HTTP_STATUS_H - - -enum HTTPStatus { - HTTP_OK = 200, - HTTP_BAD_REQUEST = 400, - HTTP_UNAUTHORIZED, - HTTP_FORBIDDEN = 403, - HTTP_NOT_FOUND, - HTTP_INTERNAL_ERROR = 500, - HTTP_INVALID = 0 -}; - - -#endif -
diff -r db560c045c62 -r 659d693a1a21 TLS_cyassl.lib --- a/TLS_cyassl.lib Mon Sep 16 09:59:26 2013 +0000 +++ b/TLS_cyassl.lib Wed Sep 18 12:41:31 2013 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/feb11/code/TLS_cyassl/#63ad554f6ca4 +https://mbed.org/users/feb11/code/TLS_cyassl/#29069dd9abfc