From: Nate E TeBlunthuis <nathante@n2347.hyak.local>
Date: Fri, 3 Jul 2020 20:35:46 +0000 (-0700)
Subject: Script for checking shas for submissions.
X-Git-Url: https://code.communitydata.science/cdsc_reddit.git/commitdiff_plain/c972d828b31b650a028ffb015367479e7fc9eb23

Script for checking shas for submissions.
---

diff --git a/check_submission_shas.py b/check_submission_shas.py
new file mode 100755
index 0000000..4950131
--- /dev/null
+++ b/check_submission_shas.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+# run from a build_machine
+
+import requests
+from os import path
+import hashlib
+
+file1 = requests.get("https://files.pushshift.io/reddit/submissions/sha256sums.txt").text
+file2 = requests.get("https://files.pushshift.io/reddit/submissions/old_v1_data/sha256sums.txt").text
+dumpdir = "/gscratch/comdata/raw_data/reddit_dumps/submissions"
+
+for l in file1.strip().split('\n') + file2.strip().split('\n'):
+    sha256_hash = hashlib.sha256()
+    parts = l.split(' ')
+
+    correct_sha256 = parts[0]
+    filename = parts[-1]
+    print(f"checking {filename}")
+    fpath = path.join(dumpdir,filename)
+    if path.isfile(fpath):
+        with open(fpath,'rb') as f:
+            for byte_block in iter(lambda: f.read(4096),b""):
+                sha256_hash.update(byte_block)
+
+        if sha256_hash.hexdigest() == correct_sha256:
+            print(f"{filename} checks out")
+        else:
+            print(f"ERROR! {filename} has the wrong hash. Redownload and recheck!")
+    else:
+        print(f"Skipping {filename} as it doesn't exist")
+