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feat(provider): support per-source proxy_url for geo-blocked upstreams

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Upstreams like justwoker/tabitoken sit behind Cloudflare geo/IP blocks and
only respond through a proxy. A global env proxy is wrong (intranet sources
trae/localzen must stay direct), so add an explicit per-source proxy_url
that overrides http.ProxyFromEnvironment for just that source. Sources
without proxy_url keep the existing env/direct behavior.

Also accepts a User-Agent header per source (config already supported
headers) so CF-fronted resellers can be reached.

Verified e2e: tabitoken and justwoker now return tool_calls through
127.0.0.1:7890 (clash); trae stays direct. Full go test -tags luajit
passes.
This commit is contained in:
JianFeeeee
2026-09-05 09:14:39 +08:00
parent 4d197e4bd3
commit 868ac59692
2 changed files with 41 additions and 17 deletions
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20
internal/provider/provider.go
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@ -13,6 +13,7 @@ import (
"log"
"net"
"net/http"
"net/url"
"strconv"
"strings"
"sync"
@ -24,6 +25,20 @@ import (
"llmsproxy/internal/types"
)
// proxyFor picks the transport proxy for one source. An explicit per-source
// proxy_url wins (e.g. clash on 127.0.0.1:7890 for a geo-blocked upstream);
// otherwise fall back to the process-wide env proxy, which is direct by
// default.
func proxyFor(cfg config.Source) func(*http.Request) (*url.URL, error) {
if cfg.ProxyURL != "" {
proxyURL, err := url.Parse(cfg.ProxyURL)
if err == nil {
return http.ProxyURL(proxyURL)
}
}
return http.ProxyFromEnvironment
}
// ---- per-(source,model) scheduling state ----
// ModelState is the scheduling state of one (source, model) pair: a soft
@ -388,8 +403,11 @@ func New(cfg config.Source, vm *lua.VM) *Provider {
// Shared transport: ResponseHeaderTimeout bounds how long we wait for the
// first response byte (applies to both paths); the stream client has no
// client-level Timeout so the SSE body can run past the header timeout.
// A per-source ProxyURL (e.g. clash on 127.0.0.1:7890) overrides the
// process-wide env proxy for upstreams that are geo/IP-blocked; sources
// without one keep http.ProxyFromEnvironment (direct by default).
tr := &http.Transport{
Proxy: http.ProxyFromEnvironment,
Proxy: proxyFor(cfg),
DialContext: (&net.Dialer{Timeout: 30 * time.Second, KeepAlive: 30 * time.Second}).DialContext,
ForceAttemptHTTP2: true,
MaxIdleConns: 100,