如何通过Cloud Python SDK压缩PDF
为了压缩PDF，我们将使用 Aspose.PDF Cloud Python SDK。这个Cloud SDK帮助Python程序员使用Aspose.PDF REST API开发基于云的PDF创建、注释、编辑和转换应用。只需在Aspose for Cloud创建一个账户并获取您的应用信息。一旦您拥有了App SID和密钥，您就可以使用Aspose.PDF Cloud Python SDK。如果python包托管在Github上，您可以直接从Github安装：
从Github安装
pip install git+https://github.com/aspose-pdf-cloud/aspose-pdf-cloud-python.git
包管理器控制台命令
pip install asposepdfcloud
通过Python SDK压缩PDF的步骤
Aspose.PDF Cloud开发者可以轻松地在几行代码中加载和优化PDF。
- 安装Python SDK
- 定义配置类
- 初始化PDF API客户端
- 使用upload_document方法上传PDF文档
- 使用compress_pdf_document方法压缩PDF文档（在此示例中，我们压缩图像并降低其质量，您可以根据需要设置其他参数）。如果需要详细信息，请查看文档页面。
- 通过post_optimize_document()发送压缩请求。
- 下载结果PDF
使用Python压缩PDF
import shutil
import json
import logging
from pathlib import Path
from asposepdfcloud import ApiClient, PdfApi, OptimizeOptions
# Configure logging
logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s")
class Config:
"""Configuration parameters."""
CREDENTIALS_FILE = Path(r"Credentials/credentials.json")
LOCAL_FOLDER = Path(r"C:\Samples")
TEMP_FOLDER = 'TempPdfCloud'
PDF_DOCUMENT_NAME = "sample.pdf"
LOCAL_RESULT_DOCUMENT_NAME = "output_sample.pdf"
class PdfCompress:
"""Class for compress PDF links using Aspose PDF Cloud API."""
def __init__(self, credentials_file: Path = Config.CREDENTIALS_FILE):
self.pdf_api = None
self._init_api(credentials_file)
def _init_api(self, credentials_file: Path):
"""Initialize the API client."""
try:
with credentials_file.open("r", encoding="utf-8") as file:
credentials = json.load(file)
api_key, app_id = credentials.get("key"), credentials.get("id")
if not api_key or not app_id:
raise ValueError("init_api(): Error: Missing API keys in the credentials file.")
self.pdf_api = PdfApi(ApiClient(api_key, app_id))
except (FileNotFoundError, json.JSONDecodeError, ValueError) as e:
logging.error(f"init_api(): Failed to load credentials: {e}")
def upload_document(self):
"""Upload a PDF document to the Aspose Cloud server."""
if self.pdf_api:
file_path = Config.LOCAL_FOLDER / Config.PDF_DOCUMENT_NAME
stotage_path = Config.TEMP_FOLDER + '/' + Config.PDF_DOCUMENT_NAME
try:
self.pdf_api.upload_file(stotage_path, str(file_path))
logging.info(f"upload_document(): File {Config.PDF_DOCUMENT_NAME} uploaded successfully.")
except Exception as e:
logging.error(f"upload_document(): Failed to upload file: {e}")
def download_result(self):
"""Download the processed PDF document from the Aspose Cloud server."""
if self.pdf_api:
try:
temp_file = self.pdf_api.download_file(Config.TEMP_FOLDER + '/' + Config.PDF_DOCUMENT_NAME)
local_path = Config.LOCAL_FOLDER / Config.LOCAL_RESULT_DOCUMENT_NAME
shutil.move(temp_file, str(local_path))
logging.info(f"download_result(): File successfully downloaded: {local_path}")
except Exception as e:
logging.error(f"download_result(): Failed to download file: {e}")
def compress_pdf_document(self):
"""Compress the PDF document."""
if self.pdf_api:
optimize_options = OptimizeOptions(
allow_reuse_page_content=False,
compress_images=True,
image_quality=75,
link_duplcate_streams=False,
remove_unused_objects=False,
remove_unused_streams=False,
unembed_fonts=False
)
opts = {
"options" : optimize_options,
"folder" : Config.TEMP_FOLDER
}
try:
response = self.pdf_api.post_optimize_document(Config.PDF_DOCUMENT_NAME, **opts)
if response.code == 200:
logging.info(f"compress_pdf_document(): PDF document '{Config.PDF_DOCUMENT_NAME}' successfully compressed.")
else:
logging.error(f"compress_pdf_document(): Failed to compress document. Response code: {response.code}")
except Exception as e:
logging.error(f"compress_pdf_document(): Error while compress document: {e}")
if __name__ == "__main__":
pdf_compress = PdfCompress()
pdf_compress.upload_document()
pdf_compress.compress_pdf_document()
pdf_compress.download_result()
使用我们的Python库，您可以：
使用Aspose.PDF Cloud Python SDK压缩PDF文档。
- 合并PDF文档。
- 拆分PDF文件。
- 将PDF转换为其他格式，反之亦然。
- 操作注释。
- 处理PDF中的图像等。
- 您可以尝试我们的免费应用在线测试功能。