wkpything - lab with python and wkhtmltox C library

get_output.py

import sys
import ctypes

class wkhtmltopdf_global_settings(ctypes.Structure):
    _fields_ = []

class wkhtmltopdf_object_settings(ctypes.Structure):
    _fields_ = []

class wkhtmltopdf_converter(ctypes.Structure):
    __fields_ = []

if __name__ == "__main__":
    # Windows DLL is shipped in
    if sys.platform == "win32":
        libwkhtmltox_path = "lib\wkhtmltox.dll"
    else:
        libwkhtmltox_path = "libwkhtmltox.so"
    # Load the shared library into ctypes
    api = ctypes.cdll.LoadLibrary(libwkhtmltox_path)

    wkhtmltopdf_is_init = api.wkhtmltopdf_init(False)
    print("wkhtmltopdf_is_init:", wkhtmltopdf_is_init)

    api.wkhtmltopdf_create_global_settings.argtypes = None
    api.wkhtmltopdf_create_global_settings.restype = ctypes.POINTER(wkhtmltopdf_global_settings)
    global_settings = api.wkhtmltopdf_create_global_settings()
    print("global_settings:", global_settings)

    api.wkhtmltopdf_create_converter.argtypes = [ctypes.POINTER(wkhtmltopdf_global_settings)]
    api.wkhtmltopdf_create_converter.restype = ctypes.POINTER(wkhtmltopdf_converter)
    converter = api.wkhtmltopdf_create_converter(global_settings)
    print("converter:", converter)

    api.wkhtmltopdf_create_object_settings.argtypes = None
    api.wkhtmltopdf_create_object_settings.restype = ctypes.POINTER(wkhtmltopdf_object_settings)
    object_settings = api.wkhtmltopdf_create_object_settings()
    print("object_settings:", object_settings)

    api.wkhtmltopdf_set_object_setting.argtypes = [ctypes.POINTER(wkhtmltopdf_object_settings), ctypes.c_char_p, ctypes.c_char_p]
    api.wkhtmltopdf_set_object_setting.restype = None
    api.wkhtmltopdf_set_object_setting(object_settings, b"page", b"http://www.google.com.br");
    print("page:", "http://www.google.com.br")

    api.wkhtmltopdf_add_object.argtypes = [ctypes.POINTER(wkhtmltopdf_converter), ctypes.POINTER(wkhtmltopdf_object_settings), ctypes.c_char_p]
    api.wkhtmltopdf_add_object.restype = None
    api.wkhtmltopdf_add_object(converter, object_settings, None)
    print("wkhtmltopdf_add_object")

    result = api.wkhtmltopdf_convert(converter)
    print("result:", result)

    http_error_code = api.wkhtmltopdf_http_error_code(converter)
    print("http_error_code:", http_error_code)

    pdf_content = ctypes.POINTER(ctypes.c_ubyte)()
    api.wkhtmltopdf_get_output.argtypes = [ctypes.POINTER(wkhtmltopdf_converter), ctypes.POINTER(ctypes.POINTER(ctypes.c_ubyte))]
    api.wkhtmltopdf_get_output.restype = ctypes.c_long
    pdf_content_length = api.wkhtmltopdf_get_output(converter, ctypes.byref(pdf_content))
    print("pdf_content_length:", pdf_content_length)
    print("pdf_content:", pdf_content)
    try:
        print("---")
        content = bytearray(pdf_content_length)
        print("content:", len(content))
        for i in range(pdf_content_length):
            content[i] = pdf_content[i]
            if content == 0:
                break
        with open("_ouput_stream_google.pdf", "wb") as pdf:
            pdf.write(content)
        print("---")
    except e:
        print("fail to read pdf_content:", e)

    api.wkhtmltopdf_destroy_converter(converter)
    print("wkhtmltopdf_destroy_converter")

    api.wkhtmltopdf_deinit()
    print("wkhtmltopdf_deinit")
    

save_output.py

import sys
import ctypes

class wkhtmltopdf_global_settings(ctypes.Structure):
    _fields_ = []

class wkhtmltopdf_object_settings(ctypes.Structure):
    _fields_ = []

class wkhtmltopdf_converter(ctypes.Structure):
    __fields_ = []

if __name__ == "__main__":
    # Windows DLL is shipped in
    if sys.platform == "win32":
        libwkhtmltox_path = "lib\wkhtmltox.dll"
    else:
        libwkhtmltox_path = "libwkhtmltox.so"
    # Load the shared library into ctypes
    api = ctypes.cdll.LoadLibrary(libwkhtmltox_path)

    wkhtmltopdf_is_init = api.wkhtmltopdf_init(False)
    print("wkhtmltopdf_is_init:", wkhtmltopdf_is_init)

    api.wkhtmltopdf_create_global_settings.argtypes = None
    api.wkhtmltopdf_create_global_settings.restype = ctypes.POINTER(wkhtmltopdf_global_settings)
    global_settings = api.wkhtmltopdf_create_global_settings()
    print("global_settings:", global_settings)

    api.wkhtmltopdf_set_global_setting.argtypes = [ctypes.POINTER(wkhtmltopdf_global_settings), ctypes.c_char_p, ctypes.c_char_p]
    api.wkhtmltopdf_set_global_setting.restype = None
    api.wkhtmltopdf_set_global_setting(global_settings, b'out', b'_auto_save_google.pdf')
    print("wkhtmltopdf_set_global_setting")

    api.wkhtmltopdf_create_converter.argtypes = [ctypes.POINTER(wkhtmltopdf_global_settings)]
    api.wkhtmltopdf_create_converter.restype = ctypes.POINTER(wkhtmltopdf_converter)
    converter = api.wkhtmltopdf_create_converter(global_settings)
    print("converter:", converter)

    api.wkhtmltopdf_create_object_settings.argtypes = None
    api.wkhtmltopdf_create_object_settings.restype = ctypes.POINTER(wkhtmltopdf_object_settings)
    object_settings = api.wkhtmltopdf_create_object_settings()
    print("object_settings:", object_settings)

    api.wkhtmltopdf_set_object_setting.argtypes = [ctypes.POINTER(wkhtmltopdf_object_settings), ctypes.c_char_p, ctypes.c_char_p]
    api.wkhtmltopdf_set_object_setting.restype = None
    api.wkhtmltopdf_set_object_setting(object_settings, b"page", b"http://www.google.com.br");
    print("page:", "http://www.google.com.br")

    api.wkhtmltopdf_add_object.argtypes = [ctypes.POINTER(wkhtmltopdf_converter), ctypes.POINTER(wkhtmltopdf_object_settings), ctypes.c_char_p]
    api.wkhtmltopdf_add_object.restype = None
    api.wkhtmltopdf_add_object(converter, object_settings, None)
    print("wkhtmltopdf_add_object")

    result = api.wkhtmltopdf_convert(converter)
    print("result:", result)

    http_error_code = api.wkhtmltopdf_http_error_code(converter)
    print("http_error_code:", http_error_code)

    api.wkhtmltopdf_destroy_converter(converter)
    print("wkhtmltopdf_destroy_converter")

    api.wkhtmltopdf_deinit()
    print("wkhtmltopdf_deinit")