fix(helioviewer): getClosestImage returns a time format that the takescreenshot-api doesn't like, so convert it to ISO-8601 first.

helioviewer_grab.py

@@ -54,7 +54,7 @@ def pick(needle):
         in (" ".join(s[1]) + " " + s[2]).lower().replace("_", " ")
     ]
     if not hits:
-        sys.exit(f"keine Datenquelle passt auf {needle!r} (siehe --list)")
+        sys.exit(f"no data source matches {needle!r} (see --list)")
     return hits[0]
 
 
@@ -68,18 +68,23 @@ def main():
     what = sys.argv[2] if len(sys.argv) > 2 else "continuum"
 
     sid, path, nick = pick(what)
-    print(f"Quelle: [{sid}] {'/'.join(path)}  ({nick})")
+    print(f"Source: [{sid}] {'/'.join(path)}  ({nick})")
 
     # Welches Bild liegt dem Wunschzeitpunkt am naechsten? Wichtig:
     # Helioviewer liefert IMMER etwas, auch wenn es Stunden daneben liegt.
     _, raw = call("getClosestImage", date=date, sourceId=sid)
     meta = json.loads(raw)
-    print(f"angefragt: {date}\ngeliefert: {meta['date']}")
+    print(f"requested: {date}\ndelivered: {meta['date']}")
+
+    # getClosestImage liefert "YYYY-MM-DD HH:MM:SS" (Leerzeichen, kein
+    # Zeitzonen-Suffix). takeScreenshot verlangt dagegen ISO 8601 mit "T"
+    # und "Z", sonst antwortet die API mit HTTP 400.
+    shot_date = meta["date"].replace(" ", "T") + "Z"
 
     layers = "[" + ",".join(path) + ",1,100]"
     ctype, png = call(
         "takeScreenshot",
-        date=meta["date"],
+        date=shot_date,
         imageScale=0.6, # Bogensekunden/Pixel -> ~3400 px Vollscheibe
         layers=layers,
         x1=-1100,
@@ -90,11 +95,10 @@ def main():
         watermark="false",
     )
     if not ctype.startswith("image"):
-        sys.exit(f"unerwartete Antwort ({ctype}): {png[:200]!r}")
+        sys.exit(f"unexpected response ({ctype}): {png[:200]!r}")
 
-    name = (
-        f"{meta['date'].replace(':', '').replace('-', '')}_{nick.replace(' ', '')}.png"
-    )
+    stamp = meta["date"].replace(":", "").replace("-", "").replace(" ", "_")
+    name = f"{stamp}_{nick.replace(' ', '')}.png"
     with open(name, "wb") as f:
         f.write(png)
     print(f"-> {name}  ({len(png) / 1e6:.1f} MB)")