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fix(ai-proxy): URL encode model name in Bedrock requests (#2321)

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This commit is contained in:
HaoJie Liu
2025-05-27 16:06:52 +08:00
committed by GitHub
parent 323aabf72b
commit 168cb04c61
1 changed files with 8 additions and 11 deletions
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19
plugins/wasm-go/extensions/ai-proxy/provider/bedrock.go
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@@ -13,6 +13,7 @@ import (
"hash/crc32"
"io"
"net/http"
"net/url"
"strconv"
"strings"
"time"
@@ -22,6 +23,8 @@ import (
"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
"github.com/higress-group/proxy-wasm-go-sdk/proxywasm"
"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
"github.com/tidwall/gjson"
"github.com/tidwall/sjson"
)
const (
@@ -607,6 +610,11 @@ func (b *bedrockProvider) insertHttpContextMessage(body []byte, content string,
}
func (b *bedrockProvider) TransformRequestBodyHeaders(ctx wrapper.HttpContext, apiName ApiName, body []byte, headers http.Header) ([]byte, error) {
if gjson.GetBytes(body, "model").Exists() {
rawModel := gjson.GetBytes(body, "model").String()
encodedModel := url.QueryEscape(rawModel)
body, _ = sjson.SetBytes(body, "model", encodedModel)
}
switch apiName {
case ApiNameChatCompletion:
return b.onChatCompletionRequestBody(ctx, body, headers)
@@ -901,7 +909,6 @@ func (b *bedrockProvider) setAuthHeaders(body []byte, headers http.Header) {
func (b *bedrockProvider) generateSignature(path, amzDate, dateStamp string, body []byte) string {
hashedPayload := sha256Hex(body)
path = urlEncoding(path)
endpoint := fmt.Sprintf(bedrockDefaultDomain, b.config.awsRegion)
canonicalHeaders := fmt.Sprintf("host:%s\nx-amz-date:%s\n", endpoint, amzDate)
@@ -918,16 +925,6 @@ func (b *bedrockProvider) generateSignature(path, amzDate, dateStamp string, bod
return signature
}
func urlEncoding(rawStr string) string {
encodedStr := strings.ReplaceAll(rawStr, ":", "%3A")
encodedStr = strings.ReplaceAll(encodedStr, "+", "%2B")
encodedStr = strings.ReplaceAll(encodedStr, "=", "%3D")
encodedStr = strings.ReplaceAll(encodedStr, "&", "%26")
encodedStr = strings.ReplaceAll(encodedStr, "$", "%24")
encodedStr = strings.ReplaceAll(encodedStr, "@", "%40")
return encodedStr
}
func getSignatureKey(key, dateStamp, region, service string) []byte {
kDate := hmacSha256([]byte("AWS4"+key), dateStamp)
kRegion := hmacSha256(kDate, region)