commit 60f07375ef15aeef7c19093d5edcdfafcc05ce3a
Author: Michael Pfaff <michael@pfaff.dev>
Date:   Wed Jan 20 21:50:36 2021 -0500

    Initial commit

diff --git a/.gitignore b/.gitignore
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diff --git a/Cargo.lock b/Cargo.lock
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+ "serde",
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+ "http-client",
+ "http-types",
+ "kv-log-macro",
+ "log",
+ "pin-project-lite 0.1.11",
+ "route-recognizer",
+ "serde",
+ "serde_json",
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+[[package]]
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+ "serde_json",
+ "wasm-bindgen-macro",
+]
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+ "lazy_static",
+ "log",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
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+ "wasm-bindgen",
+ "web-sys",
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+ "quote",
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+ "wasm-bindgen-backend",
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+]
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+ "wasm-bindgen",
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+[[package]]
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+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
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+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
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+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..ff4ba68
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "tide_csp"
+version = "0.1.0"
+authors = ["Michael Pfaff <michael@pfaff.dev>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tide = "0.15.0"
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d99d1fc
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# Tide Tracing
+
+Simple middleware for Tide to add CSP headers without needing to know the syntax.
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..0fd58fc
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,173 @@
+use core::fmt::Display;
+use core::future::Future;
+use core::pin::Pin;
+use tide::Next;
+use tide::Request;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum Directive {
+    ChildSrc(Vec<String>),
+    ConnectSrc(Vec<String>),
+    DefaultSrc(Vec<String>),
+    FontSrc(Vec<String>),
+    FrameSrc(Vec<String>),
+    ImgSrc(Vec<String>),
+    ManifestSrc(Vec<String>),
+    MediaSrc(Vec<String>),
+    ObjectSrc(Vec<String>),
+    PrefetchSrc(Vec<String>),
+    ScriptSrc(Vec<String>),
+    ScriptSrcElem(Vec<String>),
+    ScriptSrcAttr(Vec<String>),
+    StyleSrc(Vec<String>),
+    StyleSrcElem(Vec<String>),
+    StyleSrcAttr(Vec<String>),
+    WorkerSrc(Vec<String>),
+    BaseUri(Vec<String>),
+    PluginTypes(Vec<String>),
+    Sandbox(Sandbox),
+    FormAction(Vec<String>),
+    FrameAncestors(Vec<String>),
+    NavigateTo(Vec<String>),
+    ReportTo(String),
+    RequireTrustedTypesFor(TrustedTypesTarget),
+    TrustedTypes(TrustedTypes),
+    UpgradeInsecureRequests,
+}
+
+impl Display for Directive {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
+        match self {
+            Self::ChildSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::ConnectSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::DefaultSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::FontSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::FrameSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::ImgSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::ManifestSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::MediaSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::ObjectSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::PrefetchSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::ScriptSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::ScriptSrcElem(sources) => write!(f, "{}", sources.join(" ")),
+            Self::ScriptSrcAttr(sources) => write!(f, "{}", sources.join(" ")),
+            Self::StyleSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::StyleSrcElem(sources) => write!(f, "{}", sources.join(" ")),
+            Self::StyleSrcAttr(sources) => write!(f, "{}", sources.join(" ")),
+            Self::WorkerSrc(sources) => write!(f, "{}", sources.join(" ")),
+            Self::BaseUri(base_uris) => write!(f, "{}", base_uris.join(" ")),
+            Self::PluginTypes(plugin_types) => write!(f, "{}", plugin_types.join(" ")),
+            Self::Sandbox(sandbox) => write!(f, "{}", sandbox),
+            Self::FormAction(form_actions) => write!(f, "{}", form_actions.join(" ")),
+            Self::FrameAncestors(frame_ancestors) => write!(f, "{}", frame_ancestors.join(" ")),
+            Self::NavigateTo(targets) => write!(f, "{}", targets.join(" ")),
+            Self::ReportTo(report_url) => write!(f, "report-to {}", report_url),
+            Self::RequireTrustedTypesFor(target) => {
+                write!(f, "require-trusted-types-for {}", target)
+            }
+            Self::TrustedTypes(trusted_types) => write!(f, "trusted-types {}", trusted_types),
+            Self::UpgradeInsecureRequests => write!(f, "upgrade-insecure-requests"),
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum Sandbox {
+    AllowDownloadsWithoutUserActivation,
+    AllowForms,
+    AllowModals,
+    AllowOrienationLock,
+    AllowPointerLock,
+    AllowPopups,
+    AllowPopupsToEscapeSandbox,
+    AllowPresentation,
+    AllowSameOrigin,
+    AllowScripts,
+    AllowStorageAccessByUserActivation,
+    AllowTopNavigation,
+    AllowTopNavigationByUserActivation,
+}
+
+impl Display for Sandbox {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
+        write!(
+            f,
+            "{}",
+            match self {
+                Self::AllowDownloadsWithoutUserActivation =>
+                    "allow-downloads-without-user-activation",
+                Self::AllowForms => "allow-forms",
+                Self::AllowModals => "allow-modals",
+                Self::AllowOrienationLock => "allow-orienation-lock",
+                Self::AllowPointerLock => "allow-pointer-lock",
+                Self::AllowPopups => "allow-popups",
+                Self::AllowPopupsToEscapeSandbox => "allow-popups-to-escape-sandbox",
+                Self::AllowPresentation => "allow-presentation",
+                Self::AllowSameOrigin => "allow-same-origin",
+                Self::AllowScripts => "allow-scripts",
+                Self::AllowStorageAccessByUserActivation =>
+                    "allow-storage-access-by-user-activation",
+                Self::AllowTopNavigation => "allow-top-navigation",
+                Self::AllowTopNavigationByUserActivation =>
+                    "allow-top-navigation-by-user-activation",
+            }
+        )
+    }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum TrustedTypesTarget {
+    Script,
+}
+
+impl Display for TrustedTypesTarget {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
+        write!(f, "'script'")
+    }
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum TrustedTypes {
+    None,
+    Values {
+        policy_names: Vec<String>,
+        allow_duplicates: bool,
+    },
+}
+
+impl Display for TrustedTypes {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
+        match self {
+            Self::None => write!(f, "'none'"),
+            Self::Values {
+                policy_names,
+                allow_duplicates: true,
+            } => write!(f, "{} 'allow-duplicates'", policy_names.join(" ")),
+            Self::Values {
+                policy_names,
+                allow_duplicates: false,
+            } => write!(f, "{}", policy_names.join(" ")),
+        }
+    }
+}
+
+pub fn csp_middleware<'a, State: 'static + Clone + Send + Sync>(
+    directives: &'a [Directive],
+) -> impl Fn(Request<State>, Next<'a, State>) -> Pin<Box<dyn Future<Output = tide::Result> + Send + 'a>>
+{
+    move |req: Request<State>, next: Next<'a, State>| {
+        Box::pin(async move {
+            let mut res = next.run(req).await;
+            res.insert_header(
+                "Content-Security-Policy",
+                format!(
+                    "{}",
+                    directives
+                        .iter()
+                        .fold(String::new(), |a, b| a + &b.to_string() + ";")
+                ),
+            );
+            Ok(res)
+        })
+    }
+}