diff --git a/api/chalicelib/core/sourcemaps.py b/api/chalicelib/core/sourcemaps.py
index 8714b9ee2..4cf4f39c5 100644
--- a/api/chalicelib/core/sourcemaps.py
+++ b/api/chalicelib/core/sourcemaps.py
@@ -1,11 +1,11 @@
-from decouple import config
-from chalicelib.utils import helper
-
-from chalicelib.utils import s3
 import hashlib
 from urllib.parse import urlparse
 
+import requests
+from decouple import config
+
 from chalicelib.core import sourcemaps_parser
+from chalicelib.utils import s3
 
 
 def __get_key(project_id, url):
@@ -73,6 +73,11 @@ def format_payload(p, truncate_to_first=False):
     return []
 
 
+def url_exists(url):
+    r = requests.head(url, allow_redirects=False)
+    return r.status_code == 200  # and r.get("Content-Type")=="application/json"
+
+
 def get_traces_group(project_id, payload):
     frames = format_payload(payload)
 
@@ -80,25 +85,35 @@ def get_traces_group(project_id, payload):
     payloads = {}
     all_exists = True
     for i, u in enumerate(frames):
-        key = __get_key(project_id, u["absPath"])  # use filename instead?
+        file_url_exists = False
+        file_url = u["absPath"]
+        key = __get_key(project_id, file_url)  # use filename instead?
         if key not in payloads:
             file_exists = s3.exists(config('sourcemaps_bucket'), key)
-            all_exists = all_exists and file_exists
             if not file_exists:
-                print(f"{u['absPath']} sourcemap (key '{key}') doesn't exist in S3")
+                if not file_url.endswith(".map"):
+                    file_url += '.map'
+                file_url_exists = url_exists(file_url)
+                file_exists = file_url_exists
+            all_exists = all_exists and file_exists
+            if not file_exists and not file_url_exists:
+                print(f"{u['absPath']} sourcemap (key '{key}') doesn't exist in S3 nor server")
                 payloads[key] = None
             else:
                 payloads[key] = []
         results[i] = dict(u)
         results[i]["frame"] = dict(u)
         if payloads[key] is not None:
-            payloads[key].append({"resultIndex": i,
+            payloads[key].append({"resultIndex": i, "frame": dict(u), "URL": file_url,
                                   "position": {"line": u["lineNo"], "column": u["colNo"]},
-                                  "frame": dict(u)})
+                                  "isURL": not file_exists and file_url_exists})
+
     for key in payloads.keys():
         if payloads[key] is None:
             continue
-        key_results = sourcemaps_parser.get_original_trace(key=key, positions=[o["position"] for o in payloads[key]])
+        key_results = sourcemaps_parser.get_original_trace(
+            key=payloads[key][0]["URL"] if payloads[key][0]["isURL"] else key,
+            positions=[o["position"] for o in payloads[key]])
         if key_results is None:
             all_exists = False
             continue
diff --git a/api/chalicelib/core/sourcemaps_parser.py b/api/chalicelib/core/sourcemaps_parser.py
index c8918cace..df9dcef1d 100644
--- a/api/chalicelib/core/sourcemaps_parser.py
+++ b/api/chalicelib/core/sourcemaps_parser.py
@@ -11,14 +11,14 @@ if '%s' in SMR_URL:
         SMR_URL = SMR_URL % "smr"
 
 
-def get_original_trace(key, positions):
+def get_original_trace(key, positions, is_url=False):
     payload = {
         "key": key,
         "positions": positions,
         "padding": 5,
-        "bucket": config('sourcemaps_bucket')
+        "bucket": config('sourcemaps_bucket'),
+        "isURL": is_url
     }
-
     try:
         r = requests.post(SMR_URL, json=payload, timeout=config("sourcemapTimeout", cast=int, default=5))
         if r.status_code != 200:
diff --git a/sourcemap-reader/package-lock.json b/sourcemap-reader/package-lock.json
index eb866a247..ef9d38162 100644
--- a/sourcemap-reader/package-lock.json
+++ b/sourcemap-reader/package-lock.json
@@ -11,6 +11,7 @@
       "dependencies": {
         "aws-sdk": "^2.1172.0",
         "express": "^4.18.1",
+        "request": "^2.88.2",
         "source-map": "^0.7.4"
       }
     },
@@ -26,11 +27,47 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/ajv": {
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+      "dependencies": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
     "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
+    "node_modules/asn1": {
+      "version": "0.2.6",
+      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.6.tgz",
+      "integrity": "sha512-ix/FxPn0MDjeyJ7i/yoHGFt/EX6LyNbxSEhPPXODPL+KB0VPk86UYfL0lMdy+KCnv+fmvIzySwaK5COwqVbWTQ==",
+      "dependencies": {
+        "safer-buffer": "~2.1.0"
+      }
+    },
+    "node_modules/assert-plus": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha512-NfJ4UzBCcQGLDlQq7nHxH+tv3kyZ0hHQqF5BO6J7tNJeP5do1llPr8dZ8zHonfhAu0PHAdMkSo+8o0wxg9lZWw==",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
+    "node_modules/asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q=="
+    },
     "node_modules/aws-sdk": {
       "version": "2.1172.0",
       "resolved": "https://registry.npmjs.org/aws-sdk/-/aws-sdk-2.1172.0.tgz",
@@ -50,6 +87,19 @@
         "node": ">= 10.0.0"
       }
     },
+    "node_modules/aws-sign2": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
+      "integrity": "sha512-08kcGqnYf/YmjoRhfxyu+CLxBjUtHLXLXX/vUfx9l2LYzG3c1m61nrpyFUZI6zeS+Li/wWMMidD9KgrqtGq3mA==",
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/aws4": {
+      "version": "1.11.0",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.11.0.tgz",
+      "integrity": "sha512-xh1Rl34h6Fi1DC2WWKfxUTVqRsNnr6LsKz2+hfwDxQJWmrx8+c7ylaqBMcHfl1U1r2dsifOvKX3LQuLNZ+XSvA=="
+    },
     "node_modules/base64-js": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
@@ -69,6 +119,14 @@
         }
       ]
     },
+    "node_modules/bcrypt-pbkdf": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
+      "integrity": "sha512-qeFIXtP4MSoi6NLqO12WfqARWWuCKi2Rn/9hJLEmtB5yTNr9DqFWkJRCf2qShWzPeAMRnOgCrq0sg/KLv5ES9w==",
+      "dependencies": {
+        "tweetnacl": "^0.14.3"
+      }
+    },
     "node_modules/body-parser": {
       "version": "1.20.0",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.0.tgz",
@@ -122,6 +180,22 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/caseless": {
+      "version": "0.12.0",
+      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
+      "integrity": "sha512-4tYFyifaFfGacoiObjJegolkwSU4xQNGbVgUiNYVUxbQ2x2lUsFvY4hVgVzGiIe6WLOPqycWXA40l+PWsxthUw=="
+    },
+    "node_modules/combined-stream": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
+      "dependencies": {
+        "delayed-stream": "~1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -154,6 +228,22 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
       "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
     },
+    "node_modules/core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha512-3lqz5YjWTYnW6dlDa5TLaTCcShfar1e40rmcJVwCBJC6mWlFuj0eCHIElmG1g5kyuJ/GD+8Wn4FFCcz4gJPfaQ=="
+    },
+    "node_modules/dashdash": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
+      "integrity": "sha512-jRFi8UDGo6j+odZiEpjazZaWqEal3w/basFjQHQEwVtZJGDpxbH1MeYluwCS8Xq5wmLJooDlMgvVarmWfGM44g==",
+      "dependencies": {
+        "assert-plus": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=0.10"
+      }
+    },
     "node_modules/debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -162,6 +252,14 @@
         "ms": "2.0.0"
       }
     },
+    "node_modules/delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==",
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
     "node_modules/depd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -179,6 +277,15 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
+    "node_modules/ecc-jsbn": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz",
+      "integrity": "sha512-eh9O+hwRHNbG4BLTjEl3nw044CkGm5X6LoaCf7LPp7UU8Qrt47JYNi6nPX8xjW97TKGKm1ouctg0QSpZe9qrnw==",
+      "dependencies": {
+        "jsbn": "~0.1.0",
+        "safer-buffer": "^2.1.0"
+      }
+    },
     "node_modules/ee-first": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
@@ -254,6 +361,29 @@
         "node": ">= 0.10.0"
       }
     },
+    "node_modules/extend": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
+      "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g=="
+    },
+    "node_modules/extsprintf": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.3.0.tgz",
+      "integrity": "sha512-11Ndz7Nv+mvAC1j0ktTa7fAb0vLyGGX+rMHNBYQviQDGU0Hw7lhctJANqbPhu9nV9/izT/IntTgZ7Im/9LJs9g==",
+      "engines": [
+        "node >=0.6.0"
+      ]
+    },
+    "node_modules/fast-deep-equal": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
+      "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q=="
+    },
+    "node_modules/fast-json-stable-stringify": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.1.0.tgz",
+      "integrity": "sha512-lhd/wF+Lk98HZoTCtlVraHtfh5XYijIjalXck7saUtuanSDyLMxnHhSXEDJqHxD7msR8D0uCmqlkwjCV8xvwHw=="
+    },
     "node_modules/finalhandler": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.2.0.tgz",
@@ -271,6 +401,27 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/forever-agent": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz",
+      "integrity": "sha512-j0KLYPhm6zeac4lz3oJ3o65qvgQCcPubiyotZrXqEaG4hNagNYO8qdlUrX5vwqv9ohqeT/Z3j6+yW067yWWdUw==",
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/form-data": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.3.tgz",
+      "integrity": "sha512-1lLKB2Mu3aGP1Q/2eCOx0fNbRMe7XdwktwOruhfqqd0rIJWwN4Dh+E3hrPSlDCXnSR7UtZ1N38rVXm+6+MEhJQ==",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.6",
+        "mime-types": "^2.1.12"
+      },
+      "engines": {
+        "node": ">= 0.12"
+      }
+    },
     "node_modules/forwarded": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
@@ -305,6 +456,35 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/getpass": {
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/getpass/-/getpass-0.1.7.tgz",
+      "integrity": "sha512-0fzj9JxOLfJ+XGLhR8ze3unN0KZCgZwiSSDz168VERjK8Wl8kVSdcu2kspd4s4wtAa1y/qrVRiAA0WclVsu0ng==",
+      "dependencies": {
+        "assert-plus": "^1.0.0"
+      }
+    },
+    "node_modules/har-schema": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-2.0.0.tgz",
+      "integrity": "sha512-Oqluz6zhGX8cyRaTQlFMPw80bSJVG2x/cFb8ZPhUILGgHka9SsokCCOQgpveePerqidZOrT14ipqfJb7ILcW5Q==",
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/har-validator": {
+      "version": "5.1.5",
+      "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-5.1.5.tgz",
+      "integrity": "sha512-nmT2T0lljbxdQZfspsno9hgrG3Uir6Ks5afism62poxqBM6sDnMEuPmzTq8XN0OEwqKLLdh1jQI3qyE66Nzb3w==",
+      "deprecated": "this library is no longer supported",
+      "dependencies": {
+        "ajv": "^6.12.3",
+        "har-schema": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/has": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/has/-/has-1.0.3.tgz",
@@ -342,6 +522,20 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/http-signature": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.2.0.tgz",
+      "integrity": "sha512-CAbnr6Rz4CYQkLYUtSNXxQPUH2gK8f3iWexVlsnMeD+GjlsQ0Xsy1cOX+mN3dtxYomRy21CiOzU8Uhw6OwncEQ==",
+      "dependencies": {
+        "assert-plus": "^1.0.0",
+        "jsprim": "^1.2.2",
+        "sshpk": "^1.7.0"
+      },
+      "engines": {
+        "node": ">=0.8",
+        "npm": ">=1.3.7"
+      }
+    },
     "node_modules/iconv-lite": {
       "version": "0.4.24",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
@@ -371,11 +565,21 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/is-typedarray": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz",
+      "integrity": "sha512-cyA56iCMHAh5CdzjJIa4aohJyeO1YbwLi3Jc35MmRU6poroFjIGZzUzupGiRPOjgHg9TLu43xbpwXk523fMxKA=="
+    },
     "node_modules/isarray": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
       "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
     },
+    "node_modules/isstream": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz",
+      "integrity": "sha512-Yljz7ffyPbrLpLngrMtZ7NduUgVvi6wG9RJ9IUcyCd59YQ911PBJphODUcbOVbqYfxe1wuYf/LJ8PauMRwsM/g=="
+    },
     "node_modules/jmespath": {
       "version": "0.16.0",
       "resolved": "https://registry.npmjs.org/jmespath/-/jmespath-0.16.0.tgz",
@@ -384,6 +588,40 @@
         "node": ">= 0.6.0"
       }
     },
+    "node_modules/jsbn": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.1.tgz",
+      "integrity": "sha512-UVU9dibq2JcFWxQPA6KCqj5O42VOmAY3zQUfEKxU0KpTGXwNoCjkX1e13eHNvw/xPynt6pU0rZ1htjWTNTSXsg=="
+    },
+    "node_modules/json-schema": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.4.0.tgz",
+      "integrity": "sha512-es94M3nTIfsEPisRafak+HDLfHXnKBhV3vU5eqPcS3flIWqcxJWgXHXiey3YrpaNsanY5ei1VoYEbOzijuq9BA=="
+    },
+    "node_modules/json-schema-traverse": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+      "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg=="
+    },
+    "node_modules/json-stringify-safe": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
+      "integrity": "sha512-ZClg6AaYvamvYEE82d3Iyd3vSSIjQ+odgjaTzRuO3s7toCdFKczob2i0zCh7JE8kWn17yvAWhUVxvqGwUalsRA=="
+    },
+    "node_modules/jsprim": {
+      "version": "1.4.2",
+      "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.4.2.tgz",
+      "integrity": "sha512-P2bSOMAc/ciLz6DzgjVlGJP9+BrJWu5UDGK70C2iweC5QBIeFf0ZXRvGjEj2uYgrY2MkAAhsSWHDWlFtEroZWw==",
+      "dependencies": {
+        "assert-plus": "1.0.0",
+        "extsprintf": "1.3.0",
+        "json-schema": "0.4.0",
+        "verror": "1.10.0"
+      },
+      "engines": {
+        "node": ">=0.6.0"
+      }
+    },
     "node_modules/media-typer": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
@@ -448,6 +686,14 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/oauth-sign": {
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@@ -492,6 +743,11 @@
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@@ -542,6 +798,54 @@
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@@ -639,6 +943,30 @@
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@@ -655,6 +983,42 @@
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@@ -675,6 +1039,22 @@
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@@ -708,6 +1088,19 @@
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@@ -757,11 +1179,29 @@
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@@ -805,6 +1245,19 @@
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@@ -836,6 +1302,11 @@
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@@ -923,6 +1423,21 @@
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+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-2.0.0.tgz",
+      "integrity": "sha512-Oqluz6zhGX8cyRaTQlFMPw80bSJVG2x/cFb8ZPhUILGgHka9SsokCCOQgpveePerqidZOrT14ipqfJb7ILcW5Q=="
+    },
+    "har-validator": {
+      "version": "5.1.5",
+      "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-5.1.5.tgz",
+      "integrity": "sha512-nmT2T0lljbxdQZfspsno9hgrG3Uir6Ks5afism62poxqBM6sDnMEuPmzTq8XN0OEwqKLLdh1jQI3qyE66Nzb3w==",
+      "requires": {
+        "ajv": "^6.12.3",
+        "har-schema": "^2.0.0"
+      }
+    },
     "has": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/has/-/has-1.0.3.tgz",
@@ -973,6 +1510,16 @@
         "toidentifier": "1.0.1"
       }
     },
+    "http-signature": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.2.0.tgz",
+      "integrity": "sha512-CAbnr6Rz4CYQkLYUtSNXxQPUH2gK8f3iWexVlsnMeD+GjlsQ0Xsy1cOX+mN3dtxYomRy21CiOzU8Uhw6OwncEQ==",
+      "requires": {
+        "assert-plus": "^1.0.0",
+        "jsprim": "^1.2.2",
+        "sshpk": "^1.7.0"
+      }
+    },
     "iconv-lite": {
       "version": "0.4.24",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
@@ -996,16 +1543,57 @@
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
       "integrity": "sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g=="
     },
+    "is-typedarray": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz",
+      "integrity": "sha512-cyA56iCMHAh5CdzjJIa4aohJyeO1YbwLi3Jc35MmRU6poroFjIGZzUzupGiRPOjgHg9TLu43xbpwXk523fMxKA=="
+    },
     "isarray": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
       "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
     },
+    "isstream": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz",
+      "integrity": "sha512-Yljz7ffyPbrLpLngrMtZ7NduUgVvi6wG9RJ9IUcyCd59YQ911PBJphODUcbOVbqYfxe1wuYf/LJ8PauMRwsM/g=="
+    },
     "jmespath": {
       "version": "0.16.0",
       "resolved": "https://registry.npmjs.org/jmespath/-/jmespath-0.16.0.tgz",
       "integrity": "sha512-9FzQjJ7MATs1tSpnco1K6ayiYE3figslrXA72G2HQ/n76RzvYlofyi5QM+iX4YRs/pu3yzxlVQSST23+dMDknw=="
     },
+    "jsbn": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.1.tgz",
+      "integrity": "sha512-UVU9dibq2JcFWxQPA6KCqj5O42VOmAY3zQUfEKxU0KpTGXwNoCjkX1e13eHNvw/xPynt6pU0rZ1htjWTNTSXsg=="
+    },
+    "json-schema": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.4.0.tgz",
+      "integrity": "sha512-es94M3nTIfsEPisRafak+HDLfHXnKBhV3vU5eqPcS3flIWqcxJWgXHXiey3YrpaNsanY5ei1VoYEbOzijuq9BA=="
+    },
+    "json-schema-traverse": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+      "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg=="
+    },
+    "json-stringify-safe": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
+      "integrity": "sha512-ZClg6AaYvamvYEE82d3Iyd3vSSIjQ+odgjaTzRuO3s7toCdFKczob2i0zCh7JE8kWn17yvAWhUVxvqGwUalsRA=="
+    },
+    "jsprim": {
+      "version": "1.4.2",
+      "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.4.2.tgz",
+      "integrity": "sha512-P2bSOMAc/ciLz6DzgjVlGJP9+BrJWu5UDGK70C2iweC5QBIeFf0ZXRvGjEj2uYgrY2MkAAhsSWHDWlFtEroZWw==",
+      "requires": {
+        "assert-plus": "1.0.0",
+        "extsprintf": "1.3.0",
+        "json-schema": "0.4.0",
+        "verror": "1.10.0"
+      }
+    },
     "media-typer": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
@@ -1049,6 +1637,11 @@
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz",
       "integrity": "sha512-+EUsqGPLsM+j/zdChZjsnX51g4XrHFOIXwfnCVPGlQk/k5giakcKsuxCObBRu6DSm9opw/O6slWbJdghQM4bBg=="
     },
+    "oauth-sign": {
+      "version": "0.9.0",
+      "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
+      "integrity": "sha512-fexhUFFPTGV8ybAtSIGbV6gOkSv8UtRbDBnAyLQw4QPKkgNlsH2ByPGtMUqdWkos6YCRmAqViwgZrJc/mRDzZQ=="
+    },
     "object-inspect": {
       "version": "1.12.2",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.12.2.tgz",
@@ -1072,6 +1665,11 @@
       "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
       "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
     },
+    "performance-now": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
+      "integrity": "sha512-7EAHlyLHI56VEIdK57uwHdHKIaAGbnXPiw0yWbarQZOKaKpvUIgW0jWRVLiatnM+XXlSwsanIBH/hzGMJulMow=="
+    },
     "proxy-addr": {
       "version": "2.0.7",
       "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
@@ -1081,6 +1679,11 @@
         "ipaddr.js": "1.9.1"
       }
     },
+    "psl": {
+      "version": "1.9.0",
+      "resolved": "https://registry.npmjs.org/psl/-/psl-1.9.0.tgz",
+      "integrity": "sha512-E/ZsdU4HLs/68gYzgGTkMicWTLPdAftJLfJFlLUAAKZGkStNU72sZjT66SnMDVOfOWY/YAoiD7Jxa9iHvngcag=="
+    },
     "punycode": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.3.2.tgz",
@@ -1115,6 +1718,45 @@
         "unpipe": "1.0.0"
       }
     },
+    "request": {
+      "version": "2.88.2",
+      "resolved": "https://registry.npmjs.org/request/-/request-2.88.2.tgz",
+      "integrity": "sha512-MsvtOrfG9ZcrOwAW+Qi+F6HbD0CWXEh9ou77uOb7FM2WPhwT7smM833PzanhJLsgXjN89Ir6V2PczXNnMpwKhw==",
+      "requires": {
+        "aws-sign2": "~0.7.0",
+        "aws4": "^1.8.0",
+        "caseless": "~0.12.0",
+        "combined-stream": "~1.0.6",
+        "extend": "~3.0.2",
+        "forever-agent": "~0.6.1",
+        "form-data": "~2.3.2",
+        "har-validator": "~5.1.3",
+        "http-signature": "~1.2.0",
+        "is-typedarray": "~1.0.0",
+        "isstream": "~0.1.2",
+        "json-stringify-safe": "~5.0.1",
+        "mime-types": "~2.1.19",
+        "oauth-sign": "~0.9.0",
+        "performance-now": "^2.1.0",
+        "qs": "~6.5.2",
+        "safe-buffer": "^5.1.2",
+        "tough-cookie": "~2.5.0",
+        "tunnel-agent": "^0.6.0",
+        "uuid": "^3.3.2"
+      },
+      "dependencies": {
+        "qs": {
+          "version": "6.5.3",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.3.tgz",
+          "integrity": "sha512-qxXIEh4pCGfHICj1mAJQ2/2XVZkjCDTcEgfoSQxc/fYivUZxTkk7L3bDBJSoNrEzXI17oUO5Dp07ktqE5KzczA=="
+        },
+        "uuid": {
+          "version": "3.4.0",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+          "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A=="
+        }
+      }
+    },
     "safe-buffer": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -1188,6 +1830,22 @@
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.7.4.tgz",
       "integrity": "sha512-l3BikUxvPOcn5E74dZiq5BGsTb5yEwhaTSzccU6t4sDOH8NWJCstKO5QT2CvtFoK6F0saL7p9xHAqHOlCPJygA=="
     },
+    "sshpk": {
+      "version": "1.17.0",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.17.0.tgz",
+      "integrity": "sha512-/9HIEs1ZXGhSPE8X6Ccm7Nam1z8KcoCqPdI7ecm1N33EzAetWahvQWVqLZtaZQ+IDKX4IyA2o0gBzqIMkAagHQ==",
+      "requires": {
+        "asn1": "~0.2.3",
+        "assert-plus": "^1.0.0",
+        "bcrypt-pbkdf": "^1.0.0",
+        "dashdash": "^1.12.0",
+        "ecc-jsbn": "~0.1.1",
+        "getpass": "^0.1.1",
+        "jsbn": "~0.1.0",
+        "safer-buffer": "^2.0.2",
+        "tweetnacl": "~0.14.0"
+      }
+    },
     "statuses": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
@@ -1198,6 +1856,35 @@
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
       "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA=="
     },
+    "tough-cookie": {
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.5.0.tgz",
+      "integrity": "sha512-nlLsUzgm1kfLXSXfRZMc1KLAugd4hqJHDTvc2hDIwS3mZAfMEuMbc03SujMF+GEcpaX/qboeycw6iO8JwVv2+g==",
+      "requires": {
+        "psl": "^1.1.28",
+        "punycode": "^2.1.1"
+      },
+      "dependencies": {
+        "punycode": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
+          "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
+        }
+      }
+    },
+    "tunnel-agent": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+      "integrity": "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w==",
+      "requires": {
+        "safe-buffer": "^5.0.1"
+      }
+    },
+    "tweetnacl": {
+      "version": "0.14.5",
+      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
+      "integrity": "sha512-KXXFFdAbFXY4geFIwoyNK+f5Z1b7swfXABfL7HXCmoIWMKU3dmS26672A4EeQtDzLKy7SXmfBu51JolvEKwtGA=="
+    },
     "type-is": {
       "version": "1.6.18",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
@@ -1212,6 +1899,21 @@
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
       "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ=="
     },
+    "uri-js": {
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
+      "integrity": "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==",
+      "requires": {
+        "punycode": "^2.1.0"
+      },
+      "dependencies": {
+        "punycode": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
+          "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
+        }
+      }
+    },
     "url": {
       "version": "0.10.3",
       "resolved": "https://registry.npmjs.org/url/-/url-0.10.3.tgz",
@@ -1236,6 +1938,16 @@
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
       "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
     },
+    "verror": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+      "integrity": "sha512-ZZKSmDAEFOijERBLkmYfJ+vmk3w+7hOLYDNkRCuRuMJGEmqYNCNLyBBFwWKVMhfwaEF3WOd0Zlw86U/WC/+nYw==",
+      "requires": {
+        "assert-plus": "^1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "^1.2.0"
+      }
+    },
     "xml2js": {
       "version": "0.4.19",
       "resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.19.tgz",
diff --git a/sourcemap-reader/package.json b/sourcemap-reader/package.json
index ad24a481d..bf0a60d44 100644
--- a/sourcemap-reader/package.json
+++ b/sourcemap-reader/package.json
@@ -20,6 +20,7 @@
   "dependencies": {
     "aws-sdk": "^2.1172.0",
     "express": "^4.18.1",
+    "request": "^2.88.2",
     "source-map": "^0.7.4"
   }
 }
diff --git a/sourcemap-reader/run-dev.sh b/sourcemap-reader/run-dev.sh
index 3c80807dd..19ba781ce 100755
--- a/sourcemap-reader/run-dev.sh
+++ b/sourcemap-reader/run-dev.sh
@@ -1,3 +1,3 @@
 #!/bin/zsh
 
-MAPPING_WASM=./mappings.wasm npm start
\ No newline at end of file
+MAPPING_WASM=./mappings.wasm PREFIX=/abc npm start
\ No newline at end of file
diff --git a/sourcemap-reader/servers/sourcemaps-handler.js b/sourcemap-reader/servers/sourcemaps-handler.js
index 96e9efe01..86c93df7b 100644
--- a/sourcemap-reader/servers/sourcemaps-handler.js
+++ b/sourcemap-reader/servers/sourcemaps-handler.js
@@ -3,6 +3,7 @@ const fs = require('fs');
 const sourceMap = require('source-map');
 const AWS = require('aws-sdk');
 const URL = require('url');
+const request = require('request');
 const wasm = fs.readFileSync(process.env.MAPPING_WASM || '/mappings.wasm');
 sourceMap.SourceMapConsumer.initialize({
     "lib/mappings.wasm": wasm
@@ -10,102 +11,141 @@ sourceMap.SourceMapConsumer.initialize({
 
 console.log(`>sourceMap initialised using ${process.env.MAPPING_WASM || '/mappings.wasm'}`);
 
-module.exports.sourcemapReader = async event => {
-    let s3;
-
-    if (process.env.S3_HOST) {
-        s3 = new AWS.S3({
-            endpoint: process.env.S3_HOST,
-            accessKeyId: process.env.S3_KEY,
-            secretAccessKey: process.env.S3_SECRET,
-            s3ForcePathStyle: true, // needed with minio?
-            signatureVersion: 'v4'
-        });
-    } else {
-        s3 = new AWS.S3({
-            'AccessKeyID': process.env.aws_access_key_id,
-            'SecretAccessKey': process.env.aws_secret_access_key,
-            'Region': process.env.aws_region
-        });
-    }
-
-    var options = {
-        Bucket: event.bucket,
-        Key: event.key
-    };
-    return new Promise(function (resolve, reject) {
-        const getObjectStart = Date.now();
-        s3.getObject(options, (err, data) => {
-            if (err) {
-                console.error("[SR] Get S3 object failed");
-                console.error(err);
-                return reject(err);
-            }
-            const getObjectEnd = Date.now();
-            const fileSize = (data.ContentLength / 1024) / 1024;
-            options.fileSize = `${fileSize} Mb`;
-            const downloadTime = (getObjectEnd - getObjectStart) / 1000;
-            options.downloadTime = `${downloadTime} s`;
-            if (fileSize >= 3) {
-                console.log("[SR] large file:" + JSON.stringify(options));
-            }
-            let sourcemap = data.Body.toString();
-
-            return new sourceMap.SourceMapConsumer(sourcemap)
-                .then(consumer => {
-                    let results = [];
-                    for (let i = 0; i < event.positions.length; i++) {
-                        let original = consumer.originalPositionFor({
+function parseSourcemap(sourcemap, event, options, resolve, reject) {
+    const getObjectEnd = Date.now();
+    try {
+        return new sourceMap.SourceMapConsumer(sourcemap)
+            .then(consumer => {
+                let results = [];
+                for (let i = 0; i < event.positions.length; i++) {
+                    let original = consumer.originalPositionFor({
+                        line: event.positions[i].line,
+                        column: event.positions[i].column
+                    });
+                    let url = URL.parse("");
+                    let preview = [];
+                    if (original.source) {
+                        preview = consumer.sourceContentFor(original.source, true);
+                        if (preview !== null) {
+                            preview = preview.split("\n")
+                                .map((line, i) => [i + 1, line]);
+                            if (event.padding) {
+                                let start = original.line < event.padding ? 0 : original.line - event.padding;
+                                preview = preview.slice(start, original.line + event.padding);
+                            }
+                        } else {
+                            console.log(`[SR] source not found, null preview for: ${original.source}`);
+                            preview = []
+                        }
+                        url = URL.parse(original.source);
+                    } else {
+                        console.log("[SR] couldn't find original position of: " + JSON.stringify({
                             line: event.positions[i].line,
                             column: event.positions[i].column
-                        });
-                        let url = URL.parse("");
-                        let preview = [];
-                        if (original.source) {
-                            preview = consumer.sourceContentFor(original.source, true);
-                            if (preview !== null) {
-                                preview = preview.split("\n")
-                                    .map((line, i) => [i + 1, line]);
-                                if (event.padding) {
-                                    let start = original.line < event.padding ? 0 : original.line - event.padding;
-                                    preview = preview.slice(start, original.line + event.padding);
-                                }
-                            } else {
-                                console.log(`[SR] source not found, null preview for: ${original.source}`);
-                                preview = []
-                            }
-                            url = URL.parse(original.source);
-                        } else {
-                            console.log("[SR] couldn't find original position of: " + JSON.stringify({
-                                line: event.positions[i].line,
-                                column: event.positions[i].column
-                            }));
-                        }
-                        let result = {
-                            "absPath": url.href,
-                            "filename": url.pathname,
-                            "lineNo": original.line,
-                            "colNo": original.column,
-                            "function": original.name,
-                            "context": preview
-                        };
-                        // console.log(result);
-                        results.push(result);
+                        }));
                     }
-                    consumer = undefined;
+                    let result = {
+                        "absPath": url.href,
+                        "filename": url.pathname,
+                        "lineNo": original.line,
+                        "colNo": original.column,
+                        "function": original.name,
+                        "context": preview
+                    };
+                    // console.log(result);
+                    results.push(result);
+                }
+                consumer = undefined;
 
-                    const sourcemapProcessingTime = (Date.now() - getObjectEnd) / 1000;
-                    options.sourcemapProcessingTime = `${sourcemapProcessingTime} s`
-                    if (fileSize >= 3 || sourcemapProcessingTime > 2) {
-                        console.log("[SR] " + JSON.stringify(options));
+                options.sourcemapProcessingTime = (Date.now() - getObjectEnd) / 1000;
+                options.sourcemapProcessingTimeUnit = 's';
+                if (options.fileSize >= 3 || options.sourcemapProcessingTime > 2) {
+                    console.log("[SR] " + JSON.stringify(options));
+                }
+                // Use this code if you don't use the http event with the LAMBDA-PROXY integration
+                return resolve(results);
+            })
+            .catch(err => {
+                return reject(err);
+            })
+            .finally(() => {
+                sourcemap = undefined;
+            });
+    } catch (err) {
+        reject(err);
+    }
+}
+
+module.exports.sourcemapReader = async event => {
+    if (event.isURL) {
+        let options = {
+            URL: event.key
+        };
+        return new Promise(function (resolve, reject) {
+            const getObjectStart = Date.now();
+            return request.get(options.URL, (err, response, sourcemap) => {
+                if (err || response.statusCode !== 200) {
+                    console.error("[SR] Getting file from URL failed");
+                    console.error("err:");
+                    console.error(err);
+                    console.error("response:");
+                    if (err) {
+                        return reject(err);
                     }
-                    // Use this code if you don't use the http event with the LAMBDA-PROXY integration
-                    return resolve(results);
-                })
-                .finally(() => {
-                    sourcemap = undefined;
-                })
-
+                    return reject(response);
+                }
+                const getObjectEnd = Date.now();
+                options.fileSize = (response.headers['content-length'] / 1024) / 1024;
+                options.fileSizeUnit = 'Mb';
+                options.downloadTime = (getObjectEnd - getObjectStart) / 1000;
+                options.downloadTimeUnit = 's';
+                if (options.fileSize >= 3) {
+                    console.log("[SR] large file:" + JSON.stringify(options));
+                }
+                return parseSourcemap(sourcemap, event, options, resolve, reject);
+            });
         });
-    });
+    } else {
+        let s3;
+        if (process.env.S3_HOST) {
+            s3 = new AWS.S3({
+                endpoint: process.env.S3_HOST,
+                accessKeyId: process.env.S3_KEY,
+                secretAccessKey: process.env.S3_SECRET,
+                s3ForcePathStyle: true, // needed with minio?
+                signatureVersion: 'v4'
+            });
+        } else {
+            s3 = new AWS.S3({
+                'AccessKeyID': process.env.aws_access_key_id,
+                'SecretAccessKey': process.env.aws_secret_access_key,
+                'Region': process.env.aws_region
+            });
+        }
+
+        let options = {
+            Bucket: event.bucket,
+            Key: event.key
+        };
+        return new Promise(function (resolve, reject) {
+            const getObjectStart = Date.now();
+            s3.getObject(options, (err, data) => {
+                if (err) {
+                    console.error("[SR] Get S3 object failed");
+                    console.error(err);
+                    return reject(err);
+                }
+                const getObjectEnd = Date.now();
+                options.fileSize = (data.ContentLength / 1024) / 1024;
+                options.fileSizeUnit = 'Mb';
+                options.downloadTime = (getObjectEnd - getObjectStart) / 1000;
+                options.downloadTimeUnit = 's';
+                if (options.fileSize >= 3) {
+                    console.log("[SR] large file:" + JSON.stringify(options));
+                }
+                let sourcemap = data.Body.toString();
+                return parseSourcemap(sourcemap, event, options, resolve, reject);
+            });
+        });
+    }
 };
\ No newline at end of file
diff --git a/sourcemap-reader/servers/sourcemaps-server.js b/sourcemap-reader/servers/sourcemaps-server.js
index 7ac6da992..6415cdd2c 100644
--- a/sourcemap-reader/servers/sourcemaps-server.js
+++ b/sourcemap-reader/servers/sourcemaps-server.js
@@ -20,8 +20,8 @@ router.post('/', (req, res) => {
             .catch((e) => {
                 console.error("[SR] Something went wrong");
                 console.error(e);
-                res.statusCode(500);
-                res.end(e);
+                res.statusCode = 500;
+                res.end(e.toString());
             });
     })