Object Storage Service:Tutorial: Busca semântica para IPCs

import argparse
import alibabacloud_oss_v2 as oss
from alibabacloud_oss_v2.models import ListObjectsRequest, PutObjectTaggingRequest, Tagging, TagSet, Tag, PutObjectRequest
import os

def upload_video(client, bucket, video_config):
    """Upload a video."""
    try:
        # Check if the file exists.
        if not os.path.exists(video_config['path']):
            print(f'File does not exist: {video_config["path"]}')
            return False

        # Create an uploader object.
        uploader = client.uploader()

        # Execute the upload request - pass the filepath parameter correctly.
        result = uploader.upload_file(
            filepath=video_config['path'],  # Add the filepath parameter.
            request=PutObjectRequest(
                bucket=bucket,
                key=video_config['key']
            )
        )

        print(f'Successfully uploaded {video_config["key"]}:')
        print(f'status code: {result.status_code},'
              f' request id: {result.request_id}')
        return True
    except Exception as e:
        print(f'Failed to upload {video_config["key"]}: {str(e)}')
        return False

def main():
    # OSS configuration.
    args = argparse.Namespace(
        region='cn-beijing',
        bucket='ipc-videos-oss-metaquery-demo',
        endpoint='https://oss-cn-beijing.aliyuncs.com'
    )

    # Configure the OSS client.
    credentials_provider = oss.credentials.EnvironmentVariableCredentialsProvider()
    cfg = oss.config.load_default()
    cfg.credentials_provider = credentials_provider
    cfg.region = args.region
    cfg.endpoint = args.endpoint
    client = oss.Client(cfg)

    # Video file configurations, including different tags.
    videos = [
        {
            'path': '<Your-Path>/videoa.mp4',
            'key': 'videoa.mp4'
        },
        {
            'path': '<Your-Path>/videob.mp4',
            'key': 'videob.mp4'
        },
        {
            'path': '<Your-Path>/videoc.mp4',
            'key': 'videoc.mp4'
        }
    ]

    # Upload all videos.
    for video in videos:
        print(f"\nStart uploading video: {video['key']}")
        upload_video(
            client=client,
            bucket=args.bucket,
            video_config=video
        )

if __name__ == "__main__":
    main()

# -*- coding: utf-8 -*-
import argparse
import alibabacloud_oss_v2 as oss
# Parse the XML response.
import xml.etree.ElementTree as ET
import json 
from datetime import datetime 

def get_search_conditions():
    """Get the user's multi-conditional input."""
    print("Enter a semantic description (example: a yard with a parked car)")
    query = input("> Semantic keywords: ").strip()
    while not query:
        print("Semantic keywords cannot be empty!")
        query = input("> Semantic keywords: ").strip()
    return query  

def build_metaquery_xml(query):
    """Build a MetaQuery XML that complies with the OSS specification."""
    xml_parts = [f'<Query>{query}</Query>']
    # Add the MediaTypes tag. Here, it is hard-coded as video.
    xml_parts.append('<MediaTypes><MediaType>video</MediaType></MediaTypes>')

    meta_query_xml = f'''<MetaQuery>
    {"".join(xml_parts)}
</MetaQuery>'''
    return meta_query_xml  # Encode into a UTF-8 byte stream.

def format_result(key, pre_url):
    """Format a single search result."""
    return f""" File path: {key}
 File URL: {pre_url}
-----------------------"""

def semantic_search():
    # Directly assign command-line arguments.
    args = argparse.Namespace(
        region = 'cn-beijing',  # Replace with your region.
        bucket = 'ipc-videos-oss-metaquery-demo',  # Replace with your bucket name.
        endpoint = 'https://oss-cn-beijing.aliyuncs.com',  # Replace with your endpoint. You can leave it empty or delete it if not needed.
    )

    # Initialize the OSS client.
    credentials = oss.credentials.EnvironmentVariableCredentialsProvider()
    cfg = oss.config.load_default()
    cfg.credentials_provider = credentials
    cfg.region = args.region
    if args.endpoint:
        cfg.endpoint = args.endpoint
    client = oss.Client(cfg)

    # Get user input.
    query = get_search_conditions()  # Get only the query.
    # Build the request.
    try:
        # Construct the request body (XML data).
        data_str = build_metaquery_xml(query)

        # Define the operation input.
        req = oss.OperationInput(
            op_name='DoMetaQuery',  # Custom action name.
            method='POST',            # HTTP method.
            parameters={              # Query parameters.
                'metaQuery': '',
                'mode': 'semantic',
                'comp': 'query',
            },
            headers=None,             # Custom request header (optional).
            body=data_str.encode("utf-8"),  # Request body (encoded as a UTF-8 byte stream).
            bucket=args.bucket,       # Destination bucket name.
        )

        # Call the generic interface to execute the operation.
        resp = client.invoke_operation(req)

    except oss.exceptions.ServiceError as e:
        print(f" Server-side error: {e.message}")
        return
    
    root = ET.fromstring(resp.http_response.content.decode('utf-8'))
     # Find all File elements.
    files = root.findall('.//File')
    
    print(f"\n Found {len(files)} matching results:")
    

    for i, file in enumerate(files, 1):
        print(f"\nFile {i}:")

        # Extract and print various properties.
        uri_element = file.find('URI')
        uri = uri_element.text if uri_element is not None else 'N/A'
        print(f"  URI: {uri}")

        key_element = file.find('Filename')
        key = key_element.text if key_element is not None else 'N/A'
        print(f"  File name: {key}")

        size_element = file.find('Size')
        size = size_element.text if size_element is not None else 'N/A'
        print(f"  Size: {size}")

        modified_time_element = file.find('FileModifiedTime')
        modified_time = modified_time_element.text if modified_time_element is not None else 'N/A'
        print(f"  Last modified: {modified_time}")

        content_type_element = file.find('ContentType')
        content_type = content_type_element.text if content_type_element is not None else 'N/A'
        print(f"  ContentType: {content_type}")

        media_type_element = file.find('MediaType')
        media_type = media_type_element.text if media_type_element is not None else 'N/A'
        print(f"  MediaType: {media_type}")

        # You can add extraction and printing for more properties as needed, such as ImageHeight, ImageWidth, OSSStorageClass, etc.
        # image_height_element = file.find('ImageHeight')
        # image_height = image_height_element.text if image_height_element is not None else 'N/A'
        # print(f"  ImageHeight: {image_height}")

        # Generate a signed URL (if needed).
        if key != 'N/A': # Generate a URL only if the file name exists.
             try:
                pre_url = client.presign(
                    oss.GetObjectRequest(
                        bucket=args.bucket,  # Specify the bucket name.
                        key=key,        # Specify the object key.
                    )
                )
                print(f"  File URL (signed URL): {pre_url.url}")
             except Exception as e:
                 print(f"  Failed to generate signed URL: {e}")

        print("-" * 20) # Separator.
        
if __name__ == "__main__":
    semantic_search()

import argparse
import alibabacloud_oss_v2 as oss
from alibabacloud_oss_v2.models import PutObjectRequest
import os

def upload_video_with_tags(client, bucket, video_config):
    """Upload a video with tags."""
    try:
        # Check if the file exists.
        if not os.path.exists(video_config['path']):
            print(f'File does not exist: {video_config["path"]}')
            return False

        # Create an uploader object.
        uploader = client.uploader()

        # Use the tagging string directly (encoding is not required if both key and value are simple strings).
        tagging_str = f"camera={video_config['camera_tag']}"

        # Execute the upload request - include tags directly.
        result = uploader.upload_file(
            filepath=video_config['path'],
            request=PutObjectRequest(
                bucket=bucket,
                key=video_config['key'],
                tagging=tagging_str
            )
        )

        print(f'Successfully uploaded {video_config["key"]}:')
        print(f'status code: {result.status_code},'
              f' request id: {result.request_id}')
        print(f'Tags added: {tagging_str}')
        return True
    except Exception as e:
        print(f'Failed to upload {video_config["key"]}: {str(e)}')
        return False

def main():
    # OSS configuration.
    args = argparse.Namespace(
        region='cn-beijing',
        bucket='ipc-videos-oss-metaquery-demo',
        endpoint='https://oss-cn-beijing.aliyuncs.com'
    )

    # Configure the OSS client.
    credentials_provider = oss.credentials.EnvironmentVariableCredentialsProvider()
    cfg = oss.config.load_default()
    cfg.credentials_provider = credentials_provider
    cfg.region = args.region
    cfg.endpoint = args.endpoint
    client = oss.Client(cfg)

    # Video file configurations, including different tags.
    videos = [
        {
            'path': '<Your-Path>/videoa.mp4',
            'key': 'videoa.mp4',
            'camera_tag': 'camera-a'
        },
        {
            'path': '<Your-Path>/videob.mp4',
            'key': 'videob.mp4',
            'camera_tag': 'camera-b'
        },
        {
            'path': '<Your-Path>/videoc.mp4',
            'key': 'videoc.mp4',
            'camera_tag': 'camera-c'
        }
    ]

    # Upload all videos and add tags.
    for video in videos:
        print(f"\nStart uploading video: {video['key']}")
        upload_video_with_tags(
            client=client,
            bucket=args.bucket,
            video_config=video
        )

if __name__ == "__main__":
    main()

import argparse
import alibabacloud_oss_v2 as oss
from alibabacloud_oss_v2.models import GetObjectTaggingRequest, PutObjectTaggingRequest, Tagging, TagSet, Tag

def apply_tags_to_frame(client, bucket, frame_key, tags):
    """Add tags to a video."""
    try:
        # Build the tagging object.
        tagging = Tagging(
            version=1,
            tag_set=TagSet(tags=tags)
        )
        
        # Create a request to update tags.
        put_tag_request = PutObjectTaggingRequest(
            bucket=bucket,
            key=frame_key,
            tagging=tagging
        )
        
        # Update object tags.
        result = client.put_object_tagging(put_tag_request)
        
        # Convert tags to a string for printing.
        tags_str = '&'.join([f"{tag.key}={tag.value}" for tag in tags])
        print(f"Successfully added tags to {frame_key}: {tags_str}")
        return True
    except Exception as e:
        print(f"Failed to add tags: {str(e)}")
        return False

def frame_tags():
    # OSS configuration.
    args = argparse.Namespace(
        region='cn-beijing',   
        frame_bucket='ipc-videos-oss-metaquery-demo',     
        endpoint='https://oss-cn-beijing.aliyuncs.com'
    )
    
    # Configure the OSS client.
    credentials_provider = oss.credentials.EnvironmentVariableCredentialsProvider()
    cfg = oss.config.load_default()
    cfg.credentials_provider = credentials_provider
    cfg.region = args.region
    cfg.endpoint = args.endpoint
    client = oss.Client(cfg)

    # Configure your video names.
    videos = [
        'videoa.mp4',    
        'videob.mp4',
        'videoc.mp4'
    ]

    # Process each video.
    for video_filename in videos:
        print(f"\nStart processing tags for video {video_filename}") # Print the originally extracted file name.

        # Remove the file name extension, for example, 'videoa.mp4' -> 'videoa'.
        # The sample code extracts the last character of the video file name as the camera identifier. This is for reference only. You can add tags based on your actual business requirements.
        video_name_base = video_filename.split('.')[0] if '.' in video_filename else video_filename
        tags = [
            Tag(key='camera', value=f'camera-{video_name_base[-1].lower()}' if video_name_base else 'camera-unknown'),
            # Tag(key='category', value='video_monitoring')       # Add actual business category information.
        ]

        # Add tags to the video.
        apply_tags_to_frame(client, args.frame_bucket, video_filename, tags)

        print(f"Finished processing tags for video {video_filename}\n") # Print the originally extracted file name.

if __name__ == "__main__":
    frame_tags()

# -*- coding: utf-8 -*-
import argparse
import alibabacloud_oss_v2 as oss
# Parse the XML response.
import xml.etree.ElementTree as ET
import json
from datetime import datetime
# --- New import ---
from alibabacloud_oss_v2.models import GetObjectTaggingRequest
# --- End of new import ---

def get_inputs():
    """Get the user's semantic query (required) and filter conditions (optional)."""
    # 1. Get the required semantic query.
    print(" Enter a semantic description (example: a yard with a parked car)")
    query = input("> Semantic keywords: ").strip()
    while not query:
        print(" Semantic keywords cannot be empty!")
        query = input("> Semantic keywords: ").strip()

    conditions = [] # Initialize the list of filter conditions.
    target_tag = None # --- Used to store the target tag ---

    # 2. Get the optional tag filter.
    print("\n (Optional) Enter a tag filter condition (will be used for client-side filtering, example: camera=camera-a, press Enter to skip)") 
    tag_input = input("> Tag (format key=value): ").strip()
    if tag_input:
        if '=' in tag_input:
            # conditions.append({
            #     'field': 'Tags',
            #     'value': tag_input,
            #     'op': 'eq'
            # })
            target_tag = tag_input
            print(f" Info: The tag '{target_tag}' will be used for client-side filtering after results are retrieved.")
        else:
             print(" Incorrect tag format. Ignored. Please use the 'key=value' format.")

    # --- Return target_tag ---
    return query, conditions, target_tag

def build_metaquery_xml(query, conditions):
    """Build a MetaQuery XML that complies with the OSS specification (includes semantic query and optional filters)."""
    # Always include the semantic query part.
    xml_parts = [f'<Query>{query}</Query>']
    
    # Add media type restriction.
    xml_parts.append('<MediaTypes><MediaType>video</MediaType></MediaTypes>')
    
    # Add optional filter conditions - in semantic mode, only some fields are supported (such as Filename here).
    for cond in conditions:
        # In semantic mode, skip building SimpleQuery for the Tags field (although we no longer add Tags to conditions, this is kept just in case).
        if cond['field'] == 'Tags':
            continue

        json_query = json.dumps({
            "Field": cond['field'],
            "Value": cond['value'],
            "Operation": cond['op']
        }, ensure_ascii=False)
        xml_parts.append(f'<SimpleQuery>{json_query}</SimpleQuery>')

    # Combine into a complete MetaQuery XML.
    meta_query_xml = f'''<MetaQuery>
    {"".join(xml_parts)}
</MetaQuery>'''
    return meta_query_xml

def format_result(key, pre_url):
    """Format a single search result."""
    return f""" File URL: {pre_url}
 File path: {key}
-----------------------"""

def perform_search():
    # Directly assign command-line arguments.
    args = argparse.Namespace(
        region='cn-beijing',  # Replace with your region.
        bucket='ipc-videos-oss-metaquery-demo',  # Replace with your bucket name.
        endpoint='https://oss-cn-beijing.aliyuncs.com',  # Replace with your endpoint.
    )

    # Initialize the OSS client.
    credentials = oss.credentials.EnvironmentVariableCredentialsProvider()
    cfg = oss.config.load_default()
    cfg.credentials_provider = credentials
    cfg.region = args.region
    if args.endpoint:
        cfg.endpoint = args.endpoint
    client = oss.Client(cfg)

    # Get user input (semantic query + optional conditions + target tag).
    query, conditions, target_tag = get_inputs()

    # Build the request.
    try:
        # Construct the request body (XML data).
        # --- Pass only conditions (without Tags) ---
        data_str = build_metaquery_xml(query, conditions)

        # Define the operation input.
        req = oss.OperationInput(
            op_name='DoMetaQuery',
            method='POST',
            parameters={
                'metaQuery': '',
                'mode': 'semantic', # <-- Re-add semantic mode.
                'comp': 'query',
            },
            headers=None,
            body=data_str.encode("utf-8"),
            bucket=args.bucket,
        )

        # Call the generic interface to execute the operation.
        print("\n Sending DoMetaQuery request...")
        resp = client.invoke_operation(req)
        print(f"\n Request successful, HTTP status code: {resp.http_response.status_code}")
    except oss.exceptions.ServiceError as e:
        print(f" Server-side error (ServiceError): {e.message}")
        print(f"   - HTTP Status Code: {e.status_code}")
        print(f"   - Error Code: {e.error_code}")
        print(f"   - Request ID: {e.request_id}")
        return
    except oss.exceptions.ClientError as e: # Add catch for client errors.
        print(f" Client or network error (ClientError): {e.message}")
        return
    except Exception as e: # Catch other possible exceptions.
        print(f" Unknown error: {e}")
        import traceback
        traceback.print_exc() # Print the full traceback.
        return

    # Parse and process the results...
    final_results_count = 0 # --- New: Counter to tally the final qualifying results ---
    try:
        root = ET.fromstring(resp.http_response.content.decode('utf-8'))
        # Find all File elements.
        files = root.findall('.//File')

        print(f"\n Retrieved {len(files)} initial matches from OSS. Starting client-side tag filtering...")

        if not files:
            # Check for NextContinuationToken, paging may be required.
            next_token_elem = root.find('.//NextContinuationToken')
            if next_token_elem is not None and next_token_elem.text:
                print(" Note: There may be more results. The current implementation does not handle paging.")
            print("\n No initial matches found.")
            return # Return early if no files are found.

        for i, file in enumerate(files, 1):
            # Get the file name.
            key_element = file.find('Filename')
            if key_element is None:
                print(f" Warning: The {i}-th initial result is missing the Filename field. Skipped.")
                continue
            key = key_element.text

            # --- Client-side tag filtering ---
            if target_tag:
                try:
                    tagging_req = GetObjectTaggingRequest(bucket=args.bucket, key=key)
                    tagging_resp = client.get_object_tagging(tagging_req)
                    # Check if the returned tag set contains the target tag.
                    tag_found = False
                    target_k, target_v = target_tag.split('=', 1)

                    if tagging_resp.tag_set and tagging_resp.tag_set.tags: # Use .tags
                        for tag in tagging_resp.tag_set.tags: # Use .tags

                            if tag.key == target_k and tag.value == target_v:
                                tag_found = True
                                break
                    if not tag_found:
                        continue # Tag does not match, skip this file.
                except oss.exceptions.ServiceError as tag_err:
                     if tag_err.status_code == 404 and tag_err.error_code == 'NoSuchTagSet':
                         continue
                     else:
                        print(f" Warning: Error getting tags for file '{key}': {tag_err.error_code} - {tag_err.message}. Skipped.")
                        continue
                except Exception as tag_e:
                    print(f" Warning: Unknown error occurred while getting or processing tags for file '{key}': {tag_e}. Skipped.")
                    # --- Add traceback for debugging ---
                    import traceback
                    traceback.print_exc()
                    # --- End of addition ---
                    continue
            # --- End of client-side tag filtering ---

            # --- If it passes the tag filter (or if no tag filter is set), process and print the result ---
            final_results_count += 1 # Increment the final result counter.
            print(f"\n[{final_results_count}] File '{key}' matches all conditions:") # Print the final result number.

            # Generate a signed URL.
            try:
                pre_url = client.presign(
                    oss.GetObjectRequest(
                        bucket=args.bucket,
                        key=key,
                    )
                )
                print(format_result(key, pre_url.url))
            except Exception as presign_e:
                print(f" Warning: Error generating signed URL for file '{key}': {presign_e}")
                print(format_result(key, "[Could not generate URL]"))
        # --- Print final statistics after the loop ---
        print(f"\n Client-side filtering complete. Found {final_results_count} final matching results.")

    except ET.ParseError as xml_e:
        print(f" Error: Failed to parse OSS response XML - {xml_e}")
    except Exception as parse_e:
        print(f" Error: An unexpected error occurred while processing results - {parse_e}")

if __name__ == "__main__":
    perform_search()