Embedding ChakraCore into Python apps.
| # -*- coding: utf-8 -*- | |
| # Hello World! | |
| # see: https://github.com/Microsoft/ChakraCore/wiki/Embedding-ChakraCore | |
| from ctypes import * | |
| cc = cdll.LoadLibrary('ChakraCore') | |
| # typedef void (CALLBACK *JsBackgroundWorkItemCallback)(_In_opt_ void *callbackState); | |
| JsBackgroundWorkItemCallback = CFUNCTYPE(None, c_void_p) | |
| # typedef bool (CALLBACK *JsThreadServiceCallback)(_In_ JsBackgroundWorkItemCallback callback, _In_opt_ void *callbackState); | |
| JsThreadServiceCallback = CFUNCTYPE(c_bool, JsBackgroundWorkItemCallback, c_void_p) | |
| # typedef void *JsRuntimeHandle; | |
| JsRuntimeHandle = POINTER(c_uint) | |
| # typedef void *JsRef; | |
| JsRef = POINTER(c_uint) | |
| # typedef JsRef JsContextRef; | |
| JsContextRef = POINTER(c_uint) | |
| # typedef JsRef JsValueRef; | |
| JsValueRef = POINTER(c_uint) | |
| # typedef DWORD_PTR JsSourceContext; | |
| JsSourceContext = c_int64 | |
| ### | |
| ### JSRT Const References | |
| ### | |
| JS_INVALID_REFERENCE = JsRef() | |
| JS_INVALID_RUNTIME_HANDLE = JsRuntimeHandle() | |
| JS_SOURCE_CONTEXT_NONE = JsSourceContext(-1) | |
| ### | |
| ### JSRT Enum References | |
| ## enum JsErrorCode | |
| JsErrorCode = c_uint32 | |
| JsNoError = 0 | |
| ... | |
| ## enum JsRuntimeAttributes | |
| JsRuntimeAttributes = c_uint32 | |
| JsRuntimeAttributeNone = JsRuntimeAttributes(0x00000000) | |
| JsRuntimeAttributeDisableBackgroundWork = JsRuntimeAttributes(0x00000001) | |
| JsRuntimeAttributeAllowScriptInterrupt = JsRuntimeAttributes(0x00000002) | |
| JsRuntimeAttributeEnableIdleProcessing = JsRuntimeAttributes(0x00000004) | |
| JsRuntimeAttributeDisableNativeCodeGeneration = JsRuntimeAttributes(0x00000008) | |
| JsRuntimeAttributeDisableEval = JsRuntimeAttributes(0x00000010) | |
| JsRuntimeAttributeEnableExperimentalFeatures = JsRuntimeAttributes(0x00000020) | |
| JsRuntimeAttributeDispatchSetExceptionsToDebugger = JsRuntimeAttributes(0x00000040) | |
| JsRuntimeAttributeDisableFatalOnOOM = JsRuntimeAttributes(0x00000080) | |
| ### | |
| ### JSRT API References | |
| ### | |
| """ | |
| STDAPI_(JsErrorCode) | |
| JsCreateRuntime( | |
| _In_ JsRuntimeAttributes attributes, | |
| _In_opt_ JsThreadServiceCallback threadService, | |
| _Out_ JsRuntimeHandle *runtime); | |
| """ | |
| JsCreateRuntime = cc.JsCreateRuntime | |
| JsCreateRuntime.argtypes = [JsRuntimeAttributes, JsThreadServiceCallback, POINTER(JsRuntimeHandle)] | |
| JsCreateRuntime.restype = JsErrorCode | |
| """ | |
| STDAPI_(JsErrorCode) | |
| JsCreateContext( | |
| _In_ JsRuntimeHandle runtime, | |
| _Out_ JsContextRef *newContext); | |
| """ | |
| JsCreateContext = cc.JsCreateContext | |
| JsCreateContext.argtypes = [JsRuntimeHandle, POINTER(JsContextRef)] | |
| JsCreateContext.restype = JsErrorCode | |
| """ | |
| STDAPI_(JsErrorCode) | |
| JsSetCurrentContext( | |
| _In_ JsContextRef context); | |
| """ | |
| JsSetCurrentContext = cc.JsSetCurrentContext | |
| JsSetCurrentContext.argtypes = [JsContextRef] | |
| JsSetCurrentContext.restype = JsErrorCode | |
| """ | |
| STDAPI_(JsErrorCode) | |
| JsRunScript( | |
| _In_z_ const wchar_t *script, | |
| _In_ JsSourceContext sourceContext, | |
| _In_z_ const wchar_t *sourceUrl, | |
| _Out_ JsValueRef *result); | |
| """ | |
| JsRunScript = cc.JsRunScript | |
| JsRunScript.argtypes = [c_wchar_p, JsSourceContext, c_wchar_p, POINTER(JsValueRef)] | |
| JsRunScript.restype = JsErrorCode | |
| """ | |
| STDAPI_(JsErrorCode) | |
| JsConvertValueToString( | |
| _In_ JsValueRef value, | |
| _Out_ JsValueRef *stringValue); | |
| """ | |
| JsConvertValueToString = cc.JsConvertValueToString | |
| JsConvertValueToString.argtypes = [JsValueRef, POINTER(JsValueRef)] | |
| JsConvertValueToString.restype = JsErrorCode | |
| """ | |
| STDAPI_(JsErrorCode) | |
| JsStringToPointer( | |
| _In_ JsValueRef value, | |
| _Outptr_result_buffer_(*stringLength) const wchar_t **stringValue, | |
| _Out_ size_t *stringLength); | |
| """ | |
| JsStringToPointer = cc.JsStringToPointer | |
| JsStringToPointer.argtypes = [JsValueRef, POINTER(c_wchar_p), POINTER(c_size_t)] | |
| JsStringToPointer.restype = JsErrorCode | |
| """ | |
| STDAPI_(JsErrorCode) | |
| JsDisposeRuntime( | |
| _In_ JsRuntimeHandle runtime); | |
| """ | |
| JsDisposeRuntime = cc.JsDisposeRuntime | |
| JsDisposeRuntime.argtypes = [JsRuntimeHandle] | |
| JsDisposeRuntime.restype = JsErrorCode | |
| def main(): | |
| runtime = JsRuntimeHandle() | |
| context = JsContextRef() | |
| result = JsValueRef() | |
| currentSourceContext = 0 | |
| empty_str = create_unicode_buffer('') | |
| # Your script; try replace hello-world with something else | |
| script = create_unicode_buffer("(()=>{return \'Hello world!\';})()") | |
| # create a runtime | |
| JsCreateRuntime(JsRuntimeAttributeNone, JsThreadServiceCallback(), byref(runtime)) | |
| # create an execution context | |
| JsCreateContext(runtime, byref(context)) | |
| # Now set the current execution context. | |
| JsSetCurrentContext(context) | |
| # Run the script. | |
| JsRunScript(script, currentSourceContext, empty_str, byref(result)) | |
| currentSourceContext += 1 | |
| # Convert your script result to String in JavaScript; redundant if your script returns a String | |
| resultJSString = JsValueRef() | |
| JsConvertValueToString(result, byref(resultJSString)) | |
| # Project script result back to Python. | |
| resultWC = c_wchar_p() | |
| stringLength = c_size_t() | |
| JsStringToPointer(resultJSString, byref(resultWC), byref(stringLength)) | |
| print(wstring_at(resultWC)) | |
| # Dispose runtime | |
| JsSetCurrentContext(JS_INVALID_REFERENCE); | |
| JsDisposeRuntime(runtime); | |
| return 0 | |
| if __name__=='__main__': | |
| main() |
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