New Client initial

Fixes #25

hera_librarian/cli.py

@@ -1025,7 +1025,7 @@ def upload(args):
     try:
         from pathlib import Path
 
-        client.upload_file(
+        client.upload(
             local_path=Path(args.local_path),
             dest_path=Path(args.dest_store_path),
             deletion_policy=args.deletion,

hera_librarian/client.py

@@ -0,0 +1,274 @@
+"""
+The public-facing LibrarianClient object.
+"""
+
+from pathlib import Path
+from typing import TYPE_CHECKING, Optional
+
+import requests
+from pydantic import BaseModel
+
+from .deletion import DeletionPolicy
+from .exceptions import LibrarianError, LibrarianHTTPError
+from .models.ping import PingRequest, PingResponse
+from .models.uploads import (UploadCompletionRequest, UploadInitiationRequest,
+                             UploadInitiationResponse)
+from .utils import get_md5_from_path, get_size_from_path
+
+if TYPE_CHECKING:
+    from .transfers import CoreTransferManager
+
+
+class LibrarianClient:
+    """
+    A client for the Librarian API.
+    """
+
+    host: str
+    port: int
+    user: str
+
+    def __init__(self, host: str, port: int, user: str):
+        """
+        Create a new LibrarianClient.
+
+        Parameters
+        ----------
+        host : str
+            The hostname of the Librarian server.
+        port : int
+            The port of the Librarian server.
+        user : str
+            The name of the user.
+        """
+
+        if host[-1] == "/":
+            self.host = host[:-1]
+        else:
+            self.host = host
+
+        self.port = port
+        self.user = user
+
+    def __repr__(self):
+        return f"Librarian Client ({self.user}) for {self.host}:{self.port}"
+
+    @property
+    def hostname(self):
+        return f"{self.host}:{self.port}/api/v2"
+
+    def resolve(self, path: str):
+        """
+        Resolve a path to a URL.
+
+        Parameters
+        ----------
+        path : str
+            The path to resolve.
+
+        Returns
+        -------
+        str
+            The resolved URL.
+        """
+
+        if path[0] == "/":
+            return f"{self.hostname}{path}"
+        else:
+            return f"{self.hostname}/{path}"
+
+    def post(
+        self,
+        endpoint: str,
+        request: Optional[BaseModel] = None,
+        response: Optional[BaseModel] = None,
+    ) -> Optional[BaseModel]:
+        """
+        Do a POST operation, passing a JSON version of the request and expecting a
+        JSON reply; return the decoded version of the latter.
+
+        Parameters
+        ----------
+        endpoint : str
+            The endpoint to post to.
+        request : pydantic.BaseModel, optional
+            The request model to send. If None, we don't ask for anything.
+        response : pydantic.BaseModel, optional
+            The response model to expect. If None, we don't return anything.
+
+        Returns
+        -------
+        response, optional
+            The decoded response model, or None.
+
+        Raises
+        ------
+
+        LibrarianHTTPError
+            If the HTTP request fails.
+
+        pydantic.ValidationError
+            If the remote librarian returns an invalid response.
+        """
+
+        data = None if request is None else request.model_dump_json()
+
+        r = requests.post(
+            self.resolve(endpoint),
+            data=data,
+            headers={"Content-Type": "application/json"},
+        )
+
+        if str(r.status_code)[0] != "2":
+            try:
+                json = r.json()
+            except requests.exceptions.JSONDecodeError:
+                json = {}
+
+            raise LibrarianHTTPError(
+                url=endpoint,
+                status_code=r.status_code,
+                reason=json.get("reason", "<no reason provided>"),
+                suggested_remedy=json.get(
+                    "suggested_remedy", "<no suggested remedy provided>"
+                ),
+            )
+
+        if response is None:
+            return None
+        else:
+            # Note that the pydantic model wants the full bytes content
+            # not the deserialized r.json()
+            return response.model_validate_json(r.content)
+
+    def ping(self) -> PingResponse:
+        """
+        Ping the remote librarian to see if it exists.
+
+        Returns
+        -------
+
+        PingResponse
+            The response from the remote librarian.
+
+        Raises
+        ------
+
+        LibrarianHTTPError
+            If the remote librarian is unreachable.
+
+        pydantic.ValidationError
+            If the remote librarian returns an invalid response.
+        """
+
+        response: PingResponse = self.post(
+            endpoint="ping",
+            request=PingRequest(),
+            response=PingResponse,
+        )
+
+        return response
+
+    def upload(
+        self,
+        local_path: Path,
+        dest_path: Path,
+        deletion_policy: DeletionPolicy | str = DeletionPolicy.DISALLOWED,
+    ):
+        """
+        Upload a file or directory to the librarian.
+
+        Parameters
+        ----------
+        local_path : Path
+            Path of the file or directory to upload.
+        dest_path : Path
+            The destination 'path' on the librarian store (often the same as your filename, but may be under some root directory).
+        deletion_policy : DeletionPolicy | str, optional
+            Whether or not this file may be deleted, by default DeletionPolicy.DISALLOWED
+
+        Returns
+        -------
+        dict
+            _description_
+
+        Raises
+        ------
+        ValueError
+            If the provided path is incorrect.
+        LibrarianError:
+            If the remote librarian cannot be transferred to.
+        """
+
+        if isinstance(deletion_policy, str):
+            deletion_policy = DeletionPolicy.from_str(deletion_policy)
+
+        if dest_path.is_absolute():
+            raise ValueError(f"Destination path may not be absolute; got {dest_path}")
+
+        # Ask the librarian for a staging directory, and a list of transfer managers
+        # to try.
+
+        response: UploadInitiationResponse = self.post(
+            endpoint="upload/stage",
+            request=UploadInitiationRequest(
+                upload_size=get_size_from_path(local_path),
+                upload_checksum=get_md5_from_path(local_path),
+                upload_name=dest_path.name,
+                destination_location=dest_path,
+                uploader=self.user,
+            ),
+            response=UploadInitiationResponse,
+        )
+
+        transfer_managers = response.transfer_providers
+
+        # Now try all the transfer managers. If they're valid, we try to use them.
+        # If they fail, we should probably catch the exception.
+        # TODO: Catch the exception on failure.
+        used_transfer_manager: Optional["CoreTransferManager"] = None
+        used_transfer_manager_name: Optional[str] = None
+
+        # TODO: Should probably have some manual ordering here.
+        for name, transfer_manager in transfer_managers.items():
+            if transfer_manager.valid:
+                transfer_manager.transfer(
+                    local_path=local_path, remote_path=response.staging_location
+                )
+
+                # We used this.
+                used_transfer_manager = transfer_manager
+                used_transfer_manager_name = name
+
+                break
+            else:
+                print(f"Warning: transfer manager {name} is not valid.")
+
+        if used_transfer_manager is None:
+            raise LibrarianError("No valid transfer managers found.")
+
+        # If we made it here, the file is successfully on the store!
+        request = UploadCompletionRequest(
+            store_name=response.store_name,
+            staging_name=response.staging_name,
+            staging_location=response.staging_location,
+            upload_name=response.upload_name,
+            destination_location=dest_path,
+            transfer_provider_name=used_transfer_manager_name,
+            transfer_provider=used_transfer_manager,
+            # Note: meta_mode is used in current status
+            meta_mode="infer",
+            deletion_policy=deletion_policy,
+            source_name=self.user,
+            # Note: we ALWAYS use null_obsid
+            null_obsid=True,
+            uploader=self.user,
+            transfer_id=response.transfer_id,
+        )
+
+        self.post(
+            endpoint="upload/commit",
+            request=request,
+        )
+
+        return

librarian_server/deletion.py → hera_librarian/deletion.py

@@ -1,13 +1,13 @@
-from .logger import log
 from enum import Enum
 
+
 class DeletionPolicy(Enum):
     """
     Enumeration for whether or not a file can be deleted from a store.
 
     Always defaults to 'DISALLOWED' when parsing.
-    """ 
-    
+    """
+
     DISALLOWED = 0
     ALLOWED = 1
 
@@ -19,5 +19,4 @@ def from_str(cls, text: str) -> "DeletionPolicy":
         elif text == "allowed":
             return cls.ALLOWED
         else:
-            log.warning(f"Unrecognized deletion policy {text}; using DISALLOWED")
-            return cls.DISALLOWED
+            return cls.DISALLOWED

hera_librarian/exceptions.py

@@ -0,0 +1,19 @@
+"""
+Exceptions for the hera_librarian client library.
+"""
+
+
+class LibrarianHTTPError(Exception):
+    def __init__(self, url, status_code, reason, suggested_remedy):
+        super(LibrarianHTTPError, self).__init__(
+            f"HTTP request to {url} failed with status code {status_code} and reason {reason}."
+        )
+        self.url = url
+        self.status_code = status_code
+        self.reason = reason
+        self.suggested_remedy = suggested_remedy
+
+
+class LibrarianError(Exception):
+    def __init__(self, message):
+        super(LibrarianError, self).__init__(message)

librarian_background/recieve_clone.py

@@ -21,7 +21,7 @@
     TransferStatus,
     Librarian,
 )
-from librarian_server.deletion import DeletionPolicy
+from hera_librarian.deletion import DeletionPolicy
 
 from hera_librarian.models.clone import (
     CloneCompleteRequest,

librarian_server/orm/instance.py

@@ -4,8 +4,9 @@
 what files have instances on remote librarians that we are aware about.
 """
 
+from hera_librarian.deletion import DeletionPolicy
+
 from .. import database as db
-from ..deletion import DeletionPolicy
 from ..settings import server_settings
 
 from datetime import datetime

librarian_server/orm/librarian.py

@@ -6,7 +6,8 @@
 from datetime import datetime
 from .. import database as db
 
-from hera_librarian import LibrarianClient, LibrarianHTTPError
+from hera_librarian import LibrarianClient
+from hera_librarian.exceptions import LibrarianHTTPError
 from pydantic import ValidationError
 
 class Librarian(db.Base):

librarian_server/orm/storemetadata.py

@@ -10,9 +10,9 @@
 from ..stores import Stores, CoreStore
 from hera_librarian.transfers import CoreTransferManager, transfer_manager_from_name
 from hera_librarian.models.uploads import UploadCompletionRequest
+from hera_librarian.deletion import DeletionPolicy
 
 from ..webutil import ServerError
-from ..deletion import DeletionPolicy
 
 from enum import Enum
 from pathlib import Path

tests/integration_test/conftest.py

@@ -77,11 +77,9 @@ def librarian_client(server) -> LibrarianClient:
     """
 
     client = LibrarianClient(
-        conn_name="test",
-        conn_config={
-            "url": f"http://localhost:{server.id}/",
-            "authenticator": None,
-        },
+        host="http://localhost",
+        port=server.id,
+        user="test-A"
     )
 
     yield client