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Add an ability to inject an arbitrary set of headers to KV requests #135

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merged 1 commit into from
Oct 28, 2022
Merged

Add an ability to inject an arbitrary set of headers to KV requests #135

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15 changes: 14 additions & 1 deletion src/workerd/api/kv.c++
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,9 @@ jsg::Promise<KvNamespace::GetWithMetadataResult> KvNamespace::getWithMetadata(
auto urlStr = url.toString(kj::Url::Context::HTTP_PROXY_REQUEST);
auto headers = kj::HttpHeaders(context.getHeaderTable());
headers.add(FLPROD_405_HEADER, kj::str(urlStr));
for (const auto& header: additionalHeaders) {
headers.add(header.name.asPtr(), header.value.asPtr());
}

return context.awaitIo(js,
client->request(kj::HttpMethod::GET, urlStr, headers).response,
Expand Down Expand Up @@ -211,6 +214,9 @@ jsg::Promise<jsg::Value> KvNamespace::list(
auto urlStr = url.toString(kj::Url::Context::HTTP_PROXY_REQUEST);
auto headers = kj::HttpHeaders(context.getHeaderTable());
headers.add(FLPROD_405_HEADER, kj::str(urlStr));
for (const auto& header: additionalHeaders) {
headers.add(header.name.asPtr(), header.value.asPtr());
}

return context.awaitIo(js,
client->request(kj::HttpMethod::GET, urlStr, headers).response,
Expand Down Expand Up @@ -311,6 +317,9 @@ jsg::Promise<void> KvNamespace::put(

auto urlStr = url.toString(kj::Url::Context::HTTP_PROXY_REQUEST);
headers.add(FLPROD_405_HEADER, kj::str(urlStr));
for (const auto& header: additionalHeaders) {
headers.add(header.name.asPtr(), header.value.asPtr());
}

auto promise = context.waitForOutputLocks()
.then([&context, client = kj::mv(client), urlStr = kj::mv(urlStr), headers = kj::mv(headers),
Expand Down Expand Up @@ -367,9 +376,13 @@ jsg::Promise<void> KvNamespace::delete_(jsg::Lock& js, kj::String name) {
auto client = context.getHttpClient(subrequestChannel, true, nullptr, "kv_delete"_kj);
auto urlStr = kj::str("https://fake-host/", kj::encodeUriComponent(name), "?urlencoded=true");
auto promise = context.waitForOutputLocks()
.then([&context, client = kj::mv(client), urlStr = kj::mv(urlStr)]() mutable {
.then([this, &context, client = kj::mv(client), urlStr = kj::mv(urlStr)]() mutable {
auto headers = kj::HttpHeaders(context.getHeaderTable());
headers.add(FLPROD_405_HEADER, kj::str(urlStr));
for (const auto& header: additionalHeaders) {
headers.add(header.name.asPtr(), header.value.asPtr());
}

return client->request(kj::HttpMethod::DELETE, urlStr, headers,
uint64_t(0))
.response.then([](kj::HttpClient::Response&& response) mutable {
Expand Down
10 changes: 9 additions & 1 deletion src/workerd/api/kv.h
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Original file line number Diff line number Diff line change
Expand Up @@ -13,9 +13,16 @@ class KvNamespace: public jsg::Object {
// A capability to a KV namespace.

public:
explicit KvNamespace(uint subrequestChannel): subrequestChannel(subrequestChannel) {}
struct AdditionalHeader {
kj::String name;
kj::String value;
};

explicit KvNamespace(kj::Array<AdditionalHeader> additionalHeaders, uint subrequestChannel)
: additionalHeaders(kj::mv(additionalHeaders)), subrequestChannel(subrequestChannel) {}
// `subrequestChannel` is what to pass to IoContext::getHttpClient() to get an HttpClient
// representing this namespace.
// `additionalHeaders` is what gets appended to every outbound request.

struct GetOptions {
jsg::Optional<kj::String> type;
Expand Down Expand Up @@ -90,6 +97,7 @@ class KvNamespace: public jsg::Object {
}

private:
kj::Array<AdditionalHeader> additionalHeaders;
uint subrequestChannel;
};

Expand Down
3 changes: 2 additions & 1 deletion src/workerd/server/workerd-api.c++
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Expand Up @@ -450,7 +450,8 @@ void WorkerdApiIsolate::compileGlobals(
}

KJ_CASE_ONEOF(ns, Global::KvNamespace) {
value = lock.wrap(context, jsg::alloc<api::KvNamespace>(ns.subrequestChannel));
value = lock.wrap(context, jsg::alloc<api::KvNamespace>(
kj::Array<api::KvNamespace::AdditionalHeader>{}, ns.subrequestChannel));
}

KJ_CASE_ONEOF(r2, Global::R2Bucket) {
Expand Down