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Merge pull request #4067 from daniel-lucio/patch-106 

Add another working way to use Azure Speech to Text service
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FusionPBX 2019-05-21 10:58:14 -06:00 committed by GitHub
parent 0226b11523 3808ed7430
commit 4367f2b589
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1 changed files with 143 additions and 54 deletions
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99
resources/install/scripts/app/voicemail/resources/functions/record_message.lua
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@ -95,13 +95,16 @@
if (transcribe_result == '') then
freeswitch.consoleLog("notice", "[voicemail] TRANSCRIPTION: (null) \n");
return ''
else
status, transcribe_json = pcall(JSON.decode, transcribe_result);
if not status then
if (debug["info"]) then
freeswitch.consoleLog("notice", "[voicemail] error decoding bing json\n");
end
local transcribe_json = JSON.decode(transcribe_result);
--Trancribe result can be nil
if (transcribe_json["results"] == nil) then
freeswitch.consoleLog("notice", "[voicemail] TRANSCRIPTION: results = (null) \n");
return ''
return '';
end
end
if (debug["info"]) then
if (transcribe_json["results"][1]["name"] == nil) then
freeswitch.consoleLog("notice", "[voicemail] TRANSCRIPTION: (null) \n");
@ -121,6 +124,92 @@
return transcription;
end
end
if (transcribe_provider == "azure") then
local api_key1 = settings:get('voicemail', 'azure_key1', 'text') or '';
local api_server_region = settings:get('voicemail', 'azure_server_region', 'text') or '';
if (api_server_region ~= '') then
api_server_region = api_server_region .. ".";
else
if (debug["info"]) then
freeswitch.consoleLog("notice", "[voicemail] azure_server_region default setting must be set\n");
end
return '';
end
if (api_key1 ~= '') then
-- search in memcache first, azure documentation claims that the access token is valid for 10 minutes
local cache = require "resources.functions.cache";
local key = "app:voicemail:azure:access_token";
local access_token_result = cache.get(key)
if access_token_result then
if (debug["info"]) then
freeswitch.consoleLog("notice", "[voicemail] Azure access_token recovered from memcached\n");
end
else
access_token_cmd = "curl -X POST \"https://"..api_server_region.."api.cognitive.microsoft.com/sts/v1.0/issueToken\" -H \"Content-type: application/x-www-form-urlencoded\" -H \"Content-Length: 0\" -H \"Ocp-Apim-Subscription-Key: "..api_key1.."\"";
local handle = io.popen(access_token_cmd);
access_token_result = handle:read("*a");
handle:close();
if (debug["info"]) then
freeswitch.consoleLog("notice", "[voicemail] CMD: " .. access_token_cmd .. "\n");
freeswitch.consoleLog("notice", "[voicemail] ACCESS TOKEN: " .. access_token_result .. "\n");
end
--Access token request can fail
if (access_token_result == '') then
if (debug["info"]) then
freeswitch.consoleLog("notice", "[voicemail] ACCESS TOKEN: (null) \n");
end
return ''
end
--Azure returns JSON when it has to report an error
if (string.sub(access_token_result, 1, 1) == '{') then
if (debug["info"]) then
freeswitch.consoleLog("notice", "[voicemail] ERROR STRING: ".. access_token_result .. "\n");
end
return ''
end
cache.set(key, access_token_result, 120);
if (debug["info"]) then
freeswitch.consoleLog("notice", "[voicemail] Azure access_token saved into memcached: " .. access_token_result .. "\n");
end
end
transcribe_cmd = "curl -X POST \"https://"..api_server_region.."stt.speech.microsoft.com/speech/recognition/conversation/cognitiveservices/v1?language=".. transcribe_language .."&format=detailed\" -H 'Authorization: Bearer " .. access_token_result .. "' -H 'Content-type: audio/wav; codec=\"audio/pcm\"; samplerate=8000; trustsourcerate=false' --data-binary @"..file_path
local handle = io.popen(transcribe_cmd);
local transcribe_result = handle:read("*a");
handle:close();
if (debug["info"]) then
freeswitch.consoleLog("notice", "[voicemail] CMD: " .. transcribe_cmd .. "\n");
freeswitch.consoleLog("notice", "[voicemail] RESULT: " .. transcribe_result .. "\n");
end
--Trancribe request can fail
if (transcribe_result == '') then
freeswitch.consoleLog("notice", "[voicemail] TRANSCRIPTION: (null) \n");
return ''
end
local transcribe_json = JSON.decode(transcribe_result);
if (debug["info"]) then
if (transcribe_json["NBest"][1]["Display"] == nil) then
freeswitch.consoleLog("notice", "[voicemail] TRANSCRIPTION: (null) \n");
else
freeswitch.consoleLog("notice", "[voicemail] TRANSCRIPTION: " .. transcribe_json["NBest"][1]["Display"] .. "\n");
end
if (transcribe_json["NBest"][1]["Confidence"] == nil) then
freeswitch.consoleLog("notice", "[voicemail] CONFIDENCE: (null) \n");
else
freeswitch.consoleLog("notice", "[voicemail] CONFIDENCE: " .. transcribe_json["NBest"][1]["Confidence"] .. "\n");
end
end
transcription = transcribe_json["NBest"][1]["Display"];
confidence = transcribe_json["NBest"][1]["Confidence"];
return transcription;
end
end
if (transcribe_provider == "custom") then
local transcription_server = settings:get('voicemail', 'transcription_server', 'text') or '';
local api_key = settings:get('voicemail', 'api_key', 'text') or '';