1 files changed, 75 insertions, 0 deletions
diff --git a/fatcat_scholar/sandcrawler.py b/fatcat_scholar/sandcrawler.py
new file mode 100644
index 0000000..db6014f
--- /dev/null
+++ b/fatcat_scholar/sandcrawler.py
@@ -0,0 +1,75 @@
+
+import json
+import minio
+import requests
+from typing import Dict, Optional, Any
+
+class SandcrawlerPostgrestClient():
+
+    def __init__(self, api_url: str):
+        self.api_url = api_url
+        
+    def get_grobid(self, sha1: str) -> Optional[Dict[str, Any]]:
+        resp = requests.get(self.api_url + "/grobid", params=dict(sha1hex='eq.'+sha1))
+        resp.raise_for_status()
+        resp_json = resp.json()
+        if resp_json:
+            return resp_json[0]
+        else:
+            return None
+
+
+class SandcrawlerMinioClient(object):
+
+    def __init__(self, host_url: str, access_key: Optional[str] = None, secret_key: Optional[str] = None, default_bucket: Optional[str] = "sandcrawler"):
+        """
+        host is minio connection string (host:port)
+        access and secret key are as expected
+        default_bucket can be supplied so that it doesn't need to be repeated for each function call
+
+        Example config:
+
+            host="localhost:9000",
+            access_key=os.environ['MINIO_ACCESS_KEY'],
+            secret_key=os.environ['MINIO_SECRET_KEY'],
+        """
+        self.mc = minio.Minio(
+            host_url,
+            access_key=access_key,
+            secret_key=secret_key,
+            secure=False,
+        )
+        self.default_bucket = default_bucket
+
+    def _blob_path(self, folder, sha1hex, extension, prefix):
+        if not extension:
+            extension = ""
+        if not prefix:
+            prefix = ""
+        assert len(sha1hex) == 40
+        obj_path = "{}{}/{}/{}/{}{}".format(
+            prefix,
+            folder, 
+            sha1hex[0:2],
+            sha1hex[2:4],
+            sha1hex,
+            extension,
+        )
+        return obj_path 
+
+    def get_blob(self, folder, sha1hex, extension="", prefix="", bucket=None):
+        """
+        sha1hex is sha1 of the blob itself
+
+        Fetched blob from the given bucket/folder, using the sandcrawler SHA1 path convention
+        """
+        obj_path = self._blob_path(folder, sha1hex, extension, prefix)
+        if not bucket:
+            bucket = self.default_bucket
+        assert bucket
+        blob = self.mc.get_object(
+            bucket,
+            obj_path,
+        )
+        # TODO: optionally verify SHA-1?
+        return blob.data