BREAKING: remove support for JSON imports (#5037)

This commit removes support for importing JSON files as modules.

This change is dictated by security; browsers rolled back on this
support as well.

1 files changed, 0 insertions, 50 deletions

diff --git a/cli/compilers/json.rs b/cli/compilers/json.rs
deleted file mode 100644
index 0b7a91af3..000000000
--- a/cli/compilers/json.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-use crate::compilers::CompiledModule;
-use crate::file_fetcher::SourceFile;
-use deno_core::ErrBox;
-use regex::Regex;
-
-// From https://github.com/mathiasbynens/mothereff.in/blob/master/js-variables/eff.js
-static JS_RESERVED_WORDS: &str = r"^(?:do|if|in|for|let|new|try|var|case|else|enum|eval|false|null|this|true|void|with|await|break|catch|class|const|super|throw|while|yield|delete|export|import|public|return|static|switch|typeof|default|extends|finally|package|private|continue|debugger|function|arguments|interface|protected|implements|instanceof)$";
-
-pub struct JsonCompiler {}
-
-impl JsonCompiler {
-  pub async fn compile(
-    &self,
-    source_file: &SourceFile,
-  ) -> Result<CompiledModule, ErrBox> {
-    let maybe_json_value = serde_json::from_slice(&source_file.source_code);
-    if let Err(err) = maybe_json_value {
-      return Err(ErrBox::from(err));
-    }
-
-    let mut code = format!(
-      "export default {};\n",
-      std::str::from_utf8(&source_file.source_code).unwrap()
-    );
-
-    if let serde_json::Value::Object(m) = maybe_json_value.unwrap() {
-      // Best effort variable name exports
-      // Actual all allowed JS variable names are way tricker.
-      // We only handle a subset of alphanumeric names.
-      let js_var_regex = Regex::new(r"^[a-zA-Z_$][0-9a-zA-Z_$]*$").unwrap();
-      // Also avoid collision with reserved words.
-      let reserved_words = Regex::new(JS_RESERVED_WORDS).unwrap();
-      for (key, value) in m.iter() {
-        if js_var_regex.is_match(&key) && !reserved_words.is_match(&key) {
-          code.push_str(&format!(
-            "export const {} = {};\n",
-            key,
-            value.to_string()
-          ));
-        }
-      }
-    }
-
-    Ok(CompiledModule {
-      code,
-      name: source_file.url.to_string(),
-    })
-  }
-}