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8a3c001b59
* wip * #103 wip * wip * wip * support both grpc (legacy) and websockets api for aws transcribe * renaming
51 lines
1.9 KiB
C++
51 lines
1.9 KiB
C++
#ifndef TRANSCRIBEMANAGER_HPP_
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#define TRANSCRIBEMANAGER_HPP_
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#include <string>
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#include <vector>
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/** Usage
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#include "transcribe_manager.hpp"
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// get signed URL
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const string url = TranscribeManager::getSignedWebsocketUrl(accessKey_, secretKey_, region_);
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// connect to the url using a socket library (e.g. https://github.com/machinezone/IXWebSocket)
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// build request string
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string request;
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TranscribeManager::makeRequest(request, audioData); // audioData is a const vector<uint8_t>
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// send request to socket
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*
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*/
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using namespace std;
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class TranscribeManager {
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public:
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static void getSignedWebsocketUrl(string& host, string& path,
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const std::string& accessKey, const std::string& secretKey, const std::string& securityToken,
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const std::string& region, const std::string& lang, const char* vocabularyName,
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const char* vocabularyFilterName, const char* vocabularyFilterMethod,
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const char* piiEntities, int shouldIdentifyPiiEntities, const char* languageModelName);
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static bool parseResponse(const std::string& response, std::string& payload, bool& isError, bool verbose = false);
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static bool makeRequest(std::string& request, const std::vector<uint8_t>& data);
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static void writeHeader(char** buffer, const char* key, const char* val);
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private:
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static std::string getSha256(std::string str);
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static void getSignatureKey(unsigned char *signatureKey, const std::string& secretKey,
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const std::string& datestamp, const std::string& region, const std::string& service);
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static void getHMAC(unsigned char *hmac, unsigned char *key, int keyLen, const std::string& str);
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static std::string toHex(unsigned char *hmac);
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static bool verifyCRC(const char* buffer, const uint32_t totalLength);
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static void parseHeader(const char** buffer, bool& isError, bool verbose = false);
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};
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#endif /* TRANSCRIBEMANAGER_HPP_ */
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