fix(cli/fmt_errors): Abbreviate long data URLs in stack traces (#12127)

Co-authored-by: Mike White <mike.white@auctane.com>

cli/fmt_errors.rs

@@ -5,13 +5,40 @@ use crate::colors::italic_bold;
 use crate::colors::red;
 use crate::colors::yellow;
 use deno_core::error::{AnyError, JsError, JsStackFrame};
+use deno_core::url::Url;
 use std::error::Error;
 use std::fmt;
 use std::ops::Deref;
 
 const SOURCE_ABBREV_THRESHOLD: usize = 150;
+const DATA_URL_ABBREV_THRESHOLD: usize = 150;
 
-// Keep in sync with `runtime/js/40_error_stack.js`.
+pub fn format_file_name(file_name: &str) -> String {
+  if file_name.len() > DATA_URL_ABBREV_THRESHOLD {
+    if let Ok(url) = Url::parse(file_name) {
+      if url.scheme() == "data" {
+        let data_path = url.path();
+        if let Some(data_pieces) = data_path.split_once(',') {
+          let data_length = data_pieces.1.len();
+          if let Some(data_start) = data_pieces.1.get(0..20) {
+            if let Some(data_end) = data_pieces.1.get(data_length - 20..) {
+              return format!(
+                "{}:{},{}......{}",
+                url.scheme(),
+                data_pieces.0,
+                data_start,
+                data_end
+              );
+            }
+          }
+        }
+      }
+    }
+  }
+  file_name.to_string()
+}
+
+// Keep in sync with `/core/error.js`.
 pub fn format_location(frame: &JsStackFrame) -> String {
   let _internal = frame
     .file_name
@@ -22,7 +49,7 @@ pub fn format_location(frame: &JsStackFrame) -> String {
   }
   let mut result = String::new();
   if let Some(file_name) = &frame.file_name {
-    result += &cyan(&file_name).to_string();
+    result += &cyan(&format_file_name(file_name)).to_string();
   } else {
     if frame.is_eval {
       result +=

cli/ops/errors.rs

@@ -1,6 +1,7 @@
 // Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
 
 use crate::diagnostics::Diagnostics;
+use crate::fmt_errors::format_file_name;
 use crate::program_state::ProgramState;
 use crate::source_maps::get_orig_position;
 use crate::source_maps::CachedMaps;
@@ -16,6 +17,7 @@ use std::sync::Arc;
 pub fn init(rt: &mut deno_core::JsRuntime) {
   super::reg_sync(rt, "op_apply_source_map", op_apply_source_map);
   super::reg_sync(rt, "op_format_diagnostic", op_format_diagnostic);
+  super::reg_sync(rt, "op_format_file_name", op_format_file_name);
 }
 
 #[derive(Deserialize)]
@@ -60,3 +62,11 @@ fn op_format_diagnostic(
   let diagnostic: Diagnostics = serde_json::from_value(args)?;
   Ok(json!(diagnostic.to_string()))
 }
+
+fn op_format_file_name(
+  _state: &mut OpState,
+  file_name: String,
+  _: (),
+) -> Result<String, AnyError> {
+  Ok(format_file_name(&file_name))
+}

cli/tests/integration/run_tests.rs

@@ -1885,3 +1885,9 @@ itest!(dom_exception_formatting {
   output: "dom_exception_formatting.ts.out",
   exit_code: 1,
 });
+
+itest!(long_data_url_formatting {
+  args: "run long_data_url_formatting.ts",
+  output: "long_data_url_formatting.ts.out",
+  exit_code: 1,
+});

cli/tests/testdata/import_data_url_error_stack.ts.out

@@ -1,6 +1,6 @@
 [WILDCARD]error: Uncaught Error: Hello 2
    throw new Error(`Hello ${A.C}`);
          ^
-    at a (data:application/typescript;base64,ZW51bSBBIHsKICBBLAogIEIsCiAgQywKIH0KIAogZXhwb3J0IGZ1bmN0aW9uIGEoKSB7CiAgIHRocm93IG5ldyBFcnJvcihgSGVsbG8gJHtBLkN9YCk7CiB9CiA=:8:10)
+    at a (data:application/typescript;base64,ZW51bSBBIHsKICBBLAog......JHtBLkN9YCk7CiB9CiA=:8:10)
     at file:///[WILDCARD]/import_data_url_error_stack.ts:3:1
 [WILDCARD]

cli/tests/testdata/long_data_url_formatting.ts

@@ -0,0 +1,3 @@
+await import(
+  'data:application/typescript,console.trace("foo"); const error = new Error("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"); console.log(error.stack); throw error;'
+);

cli/tests/testdata/long_data_url_formatting.ts.out

@@ -0,0 +1,8 @@
+[WILDCARD]Trace: foo
+    at data:application/typescript,console.trace("foo")......stack); throw error;:1:9
+Error: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+    at data:application/typescript,console.trace("foo")......stack); throw error;:1:37
+error: Uncaught (in promise) Error: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+console.trace("foo"); const error = new Error("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"); console.log(error.stack); throw error;
+                                    ^
+    at data:application/typescript,console.trace("foo")......stack); throw error;:1:37

core/02_error.js

@@ -70,7 +70,7 @@
   }
 
   // Keep in sync with `cli/fmt_errors.rs`.
-  function formatLocation(callSite) {
+  function formatLocation(callSite, formatFileNameFn) {
     if (callSite.isNative()) {
       return "native";
     }
@@ -80,7 +80,7 @@
     const fileName = callSite.getFileName();
 
     if (fileName) {
-      result += fileName;
+      result += formatFileNameFn(fileName);
     } else {
       if (callSite.isEval()) {
         const evalOrigin = callSite.getEvalOrigin();
@@ -106,7 +106,7 @@
   }
 
   // Keep in sync with `cli/fmt_errors.rs`.
-  function formatCallSite(callSite) {
+  function formatCallSite(callSite, formatFileNameFn) {
     let result = "";
     const functionName = callSite.getFunctionName();
 
@@ -159,11 +159,11 @@
     } else if (functionName) {
       result += functionName;
     } else {
-      result += formatLocation(callSite);
+      result += formatLocation(callSite, formatFileNameFn);
       return result;
     }
 
-    result += ` (${formatLocation(callSite)})`;
+    result += ` (${formatLocation(callSite, formatFileNameFn)})`;
     return result;
   }
 
@@ -205,7 +205,7 @@
    *  columnNumber: number
    * }} sourceMappingFn
    */
-  function createPrepareStackTrace(sourceMappingFn) {
+  function createPrepareStackTrace(sourceMappingFn, formatFileNameFn) {
     return function prepareStackTrace(
       error,
       callSites,
@@ -235,7 +235,10 @@
       const formattedCallSites = [];
       for (const callSite of mappedCallSites) {
         ArrayPrototypePush(error.__callSiteEvals, evaluateCallSite(callSite));
-        ArrayPrototypePush(formattedCallSites, formatCallSite(callSite));
+        ArrayPrototypePush(
+          formattedCallSites,
+          formatCallSite(callSite, formatFileNameFn),
+        );
       }
       const message = error.message !== undefined ? error.message : "";
       const name = error.name !== undefined ? error.name : "Error";

runtime/js/40_error_stack.js

@@ -8,6 +8,10 @@
     return core.opSync("op_format_diagnostic", diagnostics);
   }
 
+  function opFormatFileName(location) {
+    return core.opSync("op_format_file_name", location);
+  }
+
   function opApplySourceMap(location) {
     const res = core.opSync("op_apply_source_map", location);
     return {
@@ -18,7 +22,8 @@
   }
 
   window.__bootstrap.errorStack = {
-    opApplySourceMap,
     opFormatDiagnostics,
+    opFormatFileName,
+    opApplySourceMap,
   };
 })(this);

runtime/js/99_main.js

@@ -218,17 +218,13 @@ delete Object.prototype.__proto__;
     );
     build.setBuildInfo(runtimeOptions.target);
     util.setLogDebug(runtimeOptions.debugFlag, source);
-    // TODO(bartlomieju): a very crude way to disable
-    // source mapping of errors. This condition is true
-    // only for compiled standalone binaries.
-    let prepareStackTrace;
-    if (runtimeOptions.applySourceMaps) {
-      prepareStackTrace = core.createPrepareStackTrace(
-        errorStack.opApplySourceMap,
-      );
-    } else {
-      prepareStackTrace = core.createPrepareStackTrace();
-    }
+    const prepareStackTrace = core.createPrepareStackTrace(
+      // TODO(bartlomieju): a very crude way to disable
+      // source mapping of errors. This condition is true
+      // only for compiled standalone binaries.
+      runtimeOptions.applySourceMaps ? errorStack.opApplySourceMap : undefined,
+      errorStack.opFormatFileName,
+    );
     // deno-lint-ignore prefer-primordials
     Error.prepareStackTrace = prepareStackTrace;
   }