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-rw-r--r--tvix/Cargo.lock57
-rw-r--r--tvix/Cargo.nix218
-rw-r--r--tvix/docs/src/TODO.md7
-rw-r--r--tvix/store/Cargo.toml3
-rw-r--r--tvix/store/src/pathinfoservice/nix_http.rs6
-rw-r--r--tvix/tracing/Cargo.toml8
-rw-r--r--tvix/tracing/default.nix2
-rw-r--r--tvix/tracing/src/lib.rs1
-rw-r--r--tvix/tracing/src/propagate/mod.rs4
-rw-r--r--tvix/tracing/src/propagate/reqwest.rs13
10 files changed, 302 insertions, 17 deletions
diff --git a/tvix/Cargo.lock b/tvix/Cargo.lock
index e758b359760d..731731e72a1b 100644
--- a/tvix/Cargo.lock
+++ b/tvix/Cargo.lock
@@ -1432,8 +1432,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "190092ea657667030ac6a35e305e62fc4dd69fd98ac98631e5d3a2b1575a12b5"
 dependencies = [
  "cfg-if",
+ "js-sys",
  "libc",
  "wasi",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -2033,6 +2035,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
 [[package]]
+name = "mime_guess"
+version = "2.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4192263c238a5f0d0c6bfd21f336a313a4ce1c450542449ca191bb657b4642ef"
+dependencies = [
+ "mime",
+ "unicase",
+]
+
+[[package]]
 name = "minimal-lexical"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2961,6 +2973,7 @@ dependencies = [
  "js-sys",
  "log",
  "mime",
+ "mime_guess",
  "once_cell",
  "percent-encoding",
  "pin-project-lite",
@@ -2984,6 +2997,39 @@ dependencies = [
 ]
 
 [[package]]
+name = "reqwest-middleware"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a735987236a8e238bf0296c7e351b999c188ccc11477f311b82b55c93984216"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "http",
+ "reqwest",
+ "serde",
+ "task-local-extensions",
+ "thiserror",
+]
+
+[[package]]
+name = "reqwest-tracing"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "190838e54153d7a7e2ea98851304b3ce92daeabf14c54d32b01b84a3e636f683"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "getrandom",
+ "matchit",
+ "opentelemetry",
+ "reqwest",
+ "reqwest-middleware",
+ "task-local-extensions",
+ "tracing",
+ "tracing-opentelemetry",
+]
+
+[[package]]
 name = "ring"
 version = "0.17.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -3643,6 +3689,15 @@ dependencies = [
 ]
 
 [[package]]
+name = "task-local-extensions"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba323866e5d033818e3240feeb9f7db2c4296674e4d9e16b97b7bf8f490434e8"
+dependencies = [
+ "pin-utils",
+]
+
+[[package]]
 name = "tempfile"
 version = "3.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -4450,6 +4505,7 @@ dependencies = [
  "prost",
  "prost-build",
  "reqwest",
+ "reqwest-middleware",
  "rstest",
  "rstest_reuse",
  "serde",
@@ -4489,6 +4545,7 @@ dependencies = [
  "opentelemetry-http",
  "opentelemetry-otlp",
  "opentelemetry_sdk",
+ "reqwest-tracing",
  "thiserror",
  "tokio",
  "tonic",
diff --git a/tvix/Cargo.nix b/tvix/Cargo.nix
index 25a9a4e6b34e..4d6e1d94628f 100644
--- a/tvix/Cargo.nix
+++ b/tvix/Cargo.nix
@@ -4326,6 +4326,12 @@ rec {
             packageId = "cfg-if";
           }
           {
+            name = "js-sys";
+            packageId = "js-sys";
+            optional = true;
+            target = { target, features }: ((("wasm32" == target."arch" or null) || ("wasm64" == target."arch" or null)) && ("unknown" == target."os" or null));
+          }
+          {
             name = "libc";
             packageId = "libc";
             usesDefaultFeatures = false;
@@ -4337,6 +4343,13 @@ rec {
             usesDefaultFeatures = false;
             target = { target, features }: ("wasi" == target."os" or null);
           }
+          {
+            name = "wasm-bindgen";
+            packageId = "wasm-bindgen";
+            optional = true;
+            usesDefaultFeatures = false;
+            target = { target, features }: ((("wasm32" == target."arch" or null) || ("wasm64" == target."arch" or null)) && ("unknown" == target."os" or null));
+          }
         ];
         features = {
           "compiler_builtins" = [ "dep:compiler_builtins" ];
@@ -4346,7 +4359,7 @@ rec {
           "rustc-dep-of-std" = [ "compiler_builtins" "core" "libc/rustc-dep-of-std" "wasi/rustc-dep-of-std" ];
           "wasm-bindgen" = [ "dep:wasm-bindgen" ];
         };
-        resolvedDefaultFeatures = [ "std" ];
+        resolvedDefaultFeatures = [ "js" "js-sys" "std" "wasm-bindgen" ];
       };
       "gimli" = rec {
         crateName = "gimli";
@@ -6084,6 +6097,34 @@ rec {
         ];
 
       };
+      "mime_guess" = rec {
+        crateName = "mime_guess";
+        version = "2.0.4";
+        edition = "2015";
+        sha256 = "1vs28rxnbfwil6f48hh58lfcx90klcvg68gxdc60spwa4cy2d4j1";
+        authors = [
+          "Austin Bonander <austin.bonander@gmail.com>"
+        ];
+        dependencies = [
+          {
+            name = "mime";
+            packageId = "mime";
+          }
+          {
+            name = "unicase";
+            packageId = "unicase";
+          }
+        ];
+        buildDependencies = [
+          {
+            name = "unicase";
+            packageId = "unicase";
+          }
+        ];
+        features = {
+          "default" = [ "rev-mappings" ];
+        };
+      };
       "minimal-lexical" = rec {
         crateName = "minimal-lexical";
         version = "0.2.1";
@@ -8992,6 +9033,12 @@ rec {
             target = { target, features }: (!("wasm32" == target."arch" or null));
           }
           {
+            name = "mime_guess";
+            packageId = "mime_guess";
+            optional = true;
+            usesDefaultFeatures = false;
+          }
+          {
             name = "once_cell";
             packageId = "once_cell";
             target = { target, features }: (!("wasm32" == target."arch" or null));
@@ -9178,7 +9225,140 @@ rec {
           "wasm-streams" = [ "dep:wasm-streams" ];
           "webpki-roots" = [ "dep:webpki-roots" ];
         };
-        resolvedDefaultFeatures = [ "__rustls" "__tls" "hyper-rustls" "json" "rustls" "rustls-native-certs" "rustls-pemfile" "rustls-tls-native-roots" "serde_json" "stream" "tokio-rustls" "tokio-util" "wasm-streams" ];
+        resolvedDefaultFeatures = [ "__rustls" "__tls" "hyper-rustls" "json" "mime_guess" "multipart" "rustls" "rustls-native-certs" "rustls-pemfile" "rustls-tls-native-roots" "serde_json" "stream" "tokio-rustls" "tokio-util" "wasm-streams" ];
+      };
+      "reqwest-middleware" = rec {
+        crateName = "reqwest-middleware";
+        version = "0.2.5";
+        edition = "2018";
+        sha256 = "05j2k29mrdc23cqpyiqirj61i74r3cspwv19y25j73ka4f3mjwss";
+        authors = [
+          "Rodrigo Gryzinski <rodrigo.gryzinski@truelayer.com>"
+        ];
+        dependencies = [
+          {
+            name = "anyhow";
+            packageId = "anyhow";
+          }
+          {
+            name = "async-trait";
+            packageId = "async-trait";
+          }
+          {
+            name = "http";
+            packageId = "http";
+          }
+          {
+            name = "reqwest";
+            packageId = "reqwest";
+            usesDefaultFeatures = false;
+            features = [ "json" "multipart" ];
+          }
+          {
+            name = "serde";
+            packageId = "serde";
+          }
+          {
+            name = "task-local-extensions";
+            packageId = "task-local-extensions";
+          }
+          {
+            name = "thiserror";
+            packageId = "thiserror";
+          }
+        ];
+
+      };
+      "reqwest-tracing" = rec {
+        crateName = "reqwest-tracing";
+        version = "0.4.8";
+        edition = "2018";
+        sha256 = "10zn6vka710vn0r4vi8lpzmdm4nfnc2171cqxbiagmsk87jkh20r";
+        authors = [
+          "Rodrigo Gryzinski <rodrigo.gryzinski@truelayer.com>"
+        ];
+        dependencies = [
+          {
+            name = "anyhow";
+            packageId = "anyhow";
+          }
+          {
+            name = "async-trait";
+            packageId = "async-trait";
+          }
+          {
+            name = "getrandom";
+            packageId = "getrandom";
+            target = { target, features }: ("wasm32" == target."arch" or null);
+            features = [ "js" ];
+          }
+          {
+            name = "matchit";
+            packageId = "matchit";
+          }
+          {
+            name = "opentelemetry";
+            packageId = "opentelemetry";
+            rename = "opentelemetry_0_22_pkg";
+            optional = true;
+          }
+          {
+            name = "reqwest";
+            packageId = "reqwest";
+            usesDefaultFeatures = false;
+          }
+          {
+            name = "reqwest-middleware";
+            packageId = "reqwest-middleware";
+          }
+          {
+            name = "task-local-extensions";
+            packageId = "task-local-extensions";
+          }
+          {
+            name = "tracing";
+            packageId = "tracing";
+          }
+          {
+            name = "tracing-opentelemetry";
+            packageId = "tracing-opentelemetry";
+            rename = "tracing-opentelemetry_0_23_pkg";
+            optional = true;
+          }
+        ];
+        features = {
+          "opentelemetry_0_13" = [ "opentelemetry_0_13_pkg" "tracing-opentelemetry_0_12_pkg" ];
+          "opentelemetry_0_13_pkg" = [ "dep:opentelemetry_0_13_pkg" ];
+          "opentelemetry_0_14" = [ "opentelemetry_0_14_pkg" "tracing-opentelemetry_0_13_pkg" ];
+          "opentelemetry_0_14_pkg" = [ "dep:opentelemetry_0_14_pkg" ];
+          "opentelemetry_0_15" = [ "opentelemetry_0_15_pkg" "tracing-opentelemetry_0_14_pkg" ];
+          "opentelemetry_0_15_pkg" = [ "dep:opentelemetry_0_15_pkg" ];
+          "opentelemetry_0_16" = [ "opentelemetry_0_16_pkg" "tracing-opentelemetry_0_16_pkg" ];
+          "opentelemetry_0_16_pkg" = [ "dep:opentelemetry_0_16_pkg" ];
+          "opentelemetry_0_17" = [ "opentelemetry_0_17_pkg" "tracing-opentelemetry_0_17_pkg" ];
+          "opentelemetry_0_17_pkg" = [ "dep:opentelemetry_0_17_pkg" ];
+          "opentelemetry_0_18" = [ "opentelemetry_0_18_pkg" "tracing-opentelemetry_0_18_pkg" ];
+          "opentelemetry_0_18_pkg" = [ "dep:opentelemetry_0_18_pkg" ];
+          "opentelemetry_0_19" = [ "opentelemetry_0_19_pkg" "tracing-opentelemetry_0_19_pkg" ];
+          "opentelemetry_0_19_pkg" = [ "dep:opentelemetry_0_19_pkg" ];
+          "opentelemetry_0_20" = [ "opentelemetry_0_20_pkg" "tracing-opentelemetry_0_20_pkg" ];
+          "opentelemetry_0_20_pkg" = [ "dep:opentelemetry_0_20_pkg" ];
+          "opentelemetry_0_21" = [ "opentelemetry_0_21_pkg" "tracing-opentelemetry_0_22_pkg" ];
+          "opentelemetry_0_21_pkg" = [ "dep:opentelemetry_0_21_pkg" ];
+          "opentelemetry_0_22" = [ "opentelemetry_0_22_pkg" "tracing-opentelemetry_0_23_pkg" ];
+          "opentelemetry_0_22_pkg" = [ "dep:opentelemetry_0_22_pkg" ];
+          "tracing-opentelemetry_0_12_pkg" = [ "dep:tracing-opentelemetry_0_12_pkg" ];
+          "tracing-opentelemetry_0_13_pkg" = [ "dep:tracing-opentelemetry_0_13_pkg" ];
+          "tracing-opentelemetry_0_14_pkg" = [ "dep:tracing-opentelemetry_0_14_pkg" ];
+          "tracing-opentelemetry_0_16_pkg" = [ "dep:tracing-opentelemetry_0_16_pkg" ];
+          "tracing-opentelemetry_0_17_pkg" = [ "dep:tracing-opentelemetry_0_17_pkg" ];
+          "tracing-opentelemetry_0_18_pkg" = [ "dep:tracing-opentelemetry_0_18_pkg" ];
+          "tracing-opentelemetry_0_19_pkg" = [ "dep:tracing-opentelemetry_0_19_pkg" ];
+          "tracing-opentelemetry_0_20_pkg" = [ "dep:tracing-opentelemetry_0_20_pkg" ];
+          "tracing-opentelemetry_0_22_pkg" = [ "dep:tracing-opentelemetry_0_22_pkg" ];
+          "tracing-opentelemetry_0_23_pkg" = [ "dep:tracing-opentelemetry_0_23_pkg" ];
+        };
+        resolvedDefaultFeatures = [ "opentelemetry_0_22" "opentelemetry_0_22_pkg" "tracing-opentelemetry_0_23_pkg" ];
       };
       "ring" = rec {
         crateName = "ring";
@@ -11164,6 +11344,23 @@ rec {
         features = { };
         resolvedDefaultFeatures = [ "default" ];
       };
+      "task-local-extensions" = rec {
+        crateName = "task-local-extensions";
+        version = "0.1.4";
+        edition = "2018";
+        sha256 = "1s1l0i4qzgxpjxmy3ng4fik2ki5jgngypzj06a782cyhwmk3hcms";
+        authors = [
+          "Conrad Ludgate <conrad.ludgate@truelayer.com>"
+          "Rodrigo Gryzinski <rodrigo.gryzinski@truelayer.com>"
+        ];
+        dependencies = [
+          {
+            name = "pin-utils";
+            packageId = "pin-utils";
+          }
+        ];
+
+      };
       "tempfile" = rec {
         crateName = "tempfile";
         version = "3.9.0";
@@ -14185,6 +14382,10 @@ rec {
             features = [ "rustls-tls-native-roots" "stream" ];
           }
           {
+            name = "reqwest-middleware";
+            packageId = "reqwest-middleware";
+          }
+          {
             name = "serde";
             packageId = "serde";
             features = [ "derive" ];
@@ -14267,7 +14468,7 @@ rec {
           {
             name = "tvix-tracing";
             packageId = "tvix-tracing";
-            features = [ "tonic" ];
+            features = [ "tonic" "reqwest" ];
           }
           {
             name = "url";
@@ -14362,6 +14563,12 @@ rec {
             features = [ "rt-tokio" ];
           }
           {
+            name = "reqwest-tracing";
+            packageId = "reqwest-tracing";
+            optional = true;
+            usesDefaultFeatures = false;
+          }
+          {
             name = "thiserror";
             packageId = "thiserror";
           }
@@ -14402,11 +14609,12 @@ rec {
           }
         ];
         features = {
-          "otlp" = [ "dep:tracing-opentelemetry" "dep:opentelemetry" "dep:opentelemetry-otlp" "dep:opentelemetry_sdk" "dep:opentelemetry-http" ];
+          "otlp" = [ "dep:tracing-opentelemetry" "dep:opentelemetry" "dep:opentelemetry-otlp" "dep:opentelemetry_sdk" "dep:opentelemetry-http" "reqwest-tracing?/opentelemetry_0_22" ];
+          "reqwest" = [ "dep:reqwest-tracing" ];
           "tonic" = [ "dep:tonic" "dep:http" ];
           "tracy" = [ "dep:tracing-tracy" ];
         };
-        resolvedDefaultFeatures = [ "default" "otlp" "tonic" "tracy" ];
+        resolvedDefaultFeatures = [ "default" "otlp" "reqwest" "tonic" "tracy" ];
       };
       "typenum" = rec {
         crateName = "typenum";
diff --git a/tvix/docs/src/TODO.md b/tvix/docs/src/TODO.md
index 127fb6f4d0c1..52fa0a9e7480 100644
--- a/tvix/docs/src/TODO.md
+++ b/tvix/docs/src/TODO.md
@@ -224,7 +224,6 @@ logs etc, but this is something requiring a lot of designing.
  - Maybe drop `--log-level` entirely, and only use `RUST_LOG` env exclusively?
    `debug`,`trace` level across all crates is a bit useless, and `RUST_LOG` can
    be much more granular…
- - Trace propagation for HTTP clients too, using
-   https://www.w3.org/TR/trace-context/ or https://www.w3.org/TR/baggage/,
-   whichever makes more sense.
-   Candidates: nix+http(s) protocol, object_store crates.
+ - Trace propagation for object_store once they support a way to register a
+   middleware, so we can use that to register a tracing middleware.
+   https://github.com/apache/arrow-rs/issues/5990
diff --git a/tvix/store/Cargo.toml b/tvix/store/Cargo.toml
index e8fbaf02c594..8063a0e874c3 100644
--- a/tvix/store/Cargo.toml
+++ b/tvix/store/Cargo.toml
@@ -36,9 +36,10 @@ tvix-castore = { path = "../castore" }
 url = "2.4.0"
 walkdir = "2.4.0"
 reqwest = { version = "0.11.22", features = ["rustls-tls-native-roots", "stream"], default-features = false }
+reqwest-middleware = "0.2.5"
 lru = "0.12.3"
 parking_lot = "0.12.2"
-tvix-tracing = { path = "../tracing", features = ["tonic"] }
+tvix-tracing = { path = "../tracing", features = ["tonic", "reqwest"] }
 tracing = "0.1.40"
 tracing-indicatif = "0.3.6"
 
diff --git a/tvix/store/src/pathinfoservice/nix_http.rs b/tvix/store/src/pathinfoservice/nix_http.rs
index 1dd7da4831b4..57fe37f44e88 100644
--- a/tvix/store/src/pathinfoservice/nix_http.rs
+++ b/tvix/store/src/pathinfoservice/nix_http.rs
@@ -31,7 +31,7 @@ use tvix_castore::{
 /// TODO: what about reading from nix-cache-info?
 pub struct NixHTTPPathInfoService<BS, DS> {
     base_url: url::Url,
-    http_client: reqwest::Client,
+    http_client: reqwest_middleware::ClientWithMiddleware,
 
     blob_service: BS,
     directory_service: DS,
@@ -45,7 +45,9 @@ impl<BS, DS> NixHTTPPathInfoService<BS, DS> {
     pub fn new(base_url: url::Url, blob_service: BS, directory_service: DS) -> Self {
         Self {
             base_url,
-            http_client: reqwest::Client::new(),
+            http_client: reqwest_middleware::ClientBuilder::new(reqwest::Client::new())
+                .with(tvix_tracing::propagate::reqwest::tracing_middleware())
+                .build(),
             blob_service,
             directory_service,
 
diff --git a/tvix/tracing/Cargo.toml b/tvix/tracing/Cargo.toml
index bc9a8c3c7792..80892bf7a09f 100644
--- a/tvix/tracing/Cargo.toml
+++ b/tvix/tracing/Cargo.toml
@@ -22,6 +22,8 @@ opentelemetry-http = { version = "0.11.0", optional = true }
 tonic = { version = "0.11.0", optional = true }
 http  = { version = "0.2.11", optional = true }
 
+reqwest-tracing = { version = "0.4.8", default-features = false, optional = true }
+
 [features]
 default = []
 otlp = [
@@ -29,7 +31,8 @@ otlp = [
   "dep:opentelemetry",
   "dep:opentelemetry-otlp",
   "dep:opentelemetry_sdk",
-  "dep:opentelemetry-http"
+  "dep:opentelemetry-http",
+  "reqwest-tracing?/opentelemetry_0_22",
 ]
 tracy = [
   "dep:tracing-tracy"
@@ -38,6 +41,9 @@ tonic = [
   "dep:tonic",
   "dep:http",
 ]
+reqwest = [
+  "dep:reqwest-tracing",
+]
 
 [lints]
 workspace = true
diff --git a/tvix/tracing/default.nix b/tvix/tracing/default.nix
index dd7dc200f2c6..a4ac9de1c8bc 100644
--- a/tvix/tracing/default.nix
+++ b/tvix/tracing/default.nix
@@ -6,6 +6,6 @@
   meta.ci.targets = lib.filter (x: lib.hasPrefix "with-features" x || x == "no-features") (lib.attrNames passthru);
   passthru = depot.tvix.utils.mkFeaturePowerset {
     inherit (old) crateName;
-    features = [ "otlp" "tracy" ];
+    features = [ "otlp" "tracy" "tonic" "reqwest" ];
   };
 })
diff --git a/tvix/tracing/src/lib.rs b/tvix/tracing/src/lib.rs
index b914408ff4c7..35fdcda5a88a 100644
--- a/tvix/tracing/src/lib.rs
+++ b/tvix/tracing/src/lib.rs
@@ -17,7 +17,6 @@ use opentelemetry_sdk::{
 #[cfg(feature = "tracy")]
 use tracing_tracy::TracyLayer;
 
-#[cfg(feature = "tonic")] // TODO or http
 pub mod propagate;
 
 lazy_static! {
diff --git a/tvix/tracing/src/propagate/mod.rs b/tvix/tracing/src/propagate/mod.rs
index 42c532e9d8cf..9a7e4332b637 100644
--- a/tvix/tracing/src/propagate/mod.rs
+++ b/tvix/tracing/src/propagate/mod.rs
@@ -1,8 +1,8 @@
 #[cfg(feature = "tonic")]
 pub mod tonic;
 
-// TODO: Helper library for reqwest. We could use
-// https://github.com/TrueLayer/reqwest-middleware/tree/main/reqwest-tracing to realise this
+#[cfg(feature = "reqwest")]
+pub mod reqwest;
 
 // TODO: Helper library for axum or another http server, see
 // https://github.com/hseeberger/hello-tracing-rs/blob/main/hello-tracing-common/src/otel/http.rs
diff --git a/tvix/tracing/src/propagate/reqwest.rs b/tvix/tracing/src/propagate/reqwest.rs
new file mode 100644
index 000000000000..e2afb3e948c7
--- /dev/null
+++ b/tvix/tracing/src/propagate/reqwest.rs
@@ -0,0 +1,13 @@
+use reqwest_tracing::{SpanBackendWithUrl, TracingMiddleware};
+
+/// Returns a new tracing middleware which can be used with reqwest_middleware.
+/// It will then write the `traceparent` in the header on the request and additionally records the
+/// `url` into `http.url`.
+///
+/// If otlp feature is disabled, this will not insert a `traceparent` into the header. It will
+/// basically function as a noop.
+///
+/// `traceparent` => https://www.w3.org/TR/trace-context/#trace-context-http-headers-format
+pub fn tracing_middleware() -> TracingMiddleware<SpanBackendWithUrl> {
+    TracingMiddleware::<SpanBackendWithUrl>::new()
+}