server: serve original error for remote models

parsers: fix `&`s in qwen3coder parameter values

model/models/gemma2/model.go

@@ -128,7 +128,7 @@ func (sa *SelfAttention) Forward(ctx ml.Context, hiddenState, positionIDs ml.Ten
 }
 
 func (m *Model) Shift(ctx ml.Context, layer int, key, shift ml.Tensor) (ml.Tensor, error) {
-	return fast.RoPE(ctx, key, shift, m.Options.attnKeyLen, m.Options.ropeBase, m.Options.ropeScale, rope.WithTypeNeoX()), nil
+	return fast.RoPE(ctx, key, shift, m.Options.attnKeyLen, m.Options.ropeBase, 1/m.Options.ropeScale, rope.WithTypeNeoX()), nil
 }
 
 type MLP struct {

model/models/gemma3/model_text.go

@@ -53,7 +53,10 @@ func newTextModel(c fs.Config) *TextModel {
 			eps:            c.Float("attention.layer_norm_rms_epsilon", 1e-06),
 			ropeLocalBase:  c.Float("rope.local.freq_base", 10000.0),
 			ropeGlobalBase: c.Float("rope.global.freq_base", 1000000.0),
-			ropeScale:      c.Float("rope.scaling.factor", 1.0),
+			ropeScale:      1,
+			// NOTE: the rope.scaling.factor is set incorrectly in the official QAT weights
+			//       (8 instead of 1)
+			// ropeScale:      c.Float("rope.scaling.factor", 1.0),
 		},
 	}
 
@@ -113,7 +116,7 @@ func (m *TextModel) Shift(ctx ml.Context, layer int, key, shift ml.Tensor) (ml.T
 		ropeBase = m.TextConfig.ropeGlobalBase
 	}
 
-	return fast.RoPE(ctx, key, shift, m.TextConfig.attnKeyLen, ropeBase, m.TextConfig.ropeScale, rope.WithTypeNeoX()), nil
+	return fast.RoPE(ctx, key, shift, m.TextConfig.attnKeyLen, ropeBase, 1/m.TextConfig.ropeScale, rope.WithTypeNeoX()), nil
 }
 
 type TextMLP struct {

model/parsers/qwen3coder.go

@@ -393,18 +393,55 @@ func parseValue(raw string, paramType api.PropertyType) any {
 	return raw
 }
 
-var qwenTagRegex = regexp.MustCompile(`<(\w+)=([^>]+)>`)
+var (
+	qwenTagRegex    = regexp.MustCompile(`<(\w+)=([^>]+)>`)
+	qwenXMLTagRegex = regexp.MustCompile(`</?(?:function|parameter)(?:\s+name="[^"]*")?>`)
+)
 
 // transformToXML transforms a raw qwen tool call with xml-like tags into valid
 // xml so that it can be parsed by any xml parser
 func transformToXML(raw string) string {
 	// take the form `<tag=abc>` and transform it to `<tag name="abc">`, taking
 	// care to properly escape the string that becomes the attribute value
-	return qwenTagRegex.ReplaceAllStringFunc(raw, func(match string) string {
+	transformed := qwenTagRegex.ReplaceAllStringFunc(raw, func(match string) string {
 		groups := qwenTagRegex.FindStringSubmatch(match)
 		tag := groups[1]
 		var escapedValue strings.Builder
 		xml.EscapeText(&escapedValue, []byte(groups[2]))
 		return fmt.Sprintf(`<%s name="%s">`, tag, escapedValue.String())
 	})
+
+	// Walk the resulting string, escaping any character data that sits between the
+	// xml tags we just emitted
+	var out strings.Builder
+	lastIdx := 0
+	for _, loc := range qwenXMLTagRegex.FindAllStringIndex(transformed, -1) {
+		if loc[0] > lastIdx {
+			escapeTextNode(&out, transformed[lastIdx:loc[0]])
+		}
+		out.WriteString(transformed[loc[0]:loc[1]])
+		lastIdx = loc[1]
+	}
+	if lastIdx < len(transformed) {
+		escapeTextNode(&out, transformed[lastIdx:])
+	}
+
+	return out.String()
+}
+
+// escapeTextNode escapes XML character data without altering other characters
+// like newlines or tabs (which is why we don't use xml.EscapeText for this)
+func escapeTextNode(sb *strings.Builder, s string) {
+	for _, r := range s {
+		switch r {
+		case '&':
+			sb.WriteString("&amp;")
+		case '<':
+			sb.WriteString("&lt;")
+		case '>':
+			sb.WriteString("&gt;")
+		default:
+			sb.WriteRune(r)
+		}
+	}
 }

model/parsers/qwen3coder_test.go

@@ -312,6 +312,41 @@ true
 				},
 			},
 		},
+		// regression test for <https://github.com/ollama/ollama/issues/12357>
+		{
+			name:  "ampersands in parameter values",
+			tools: []api.Tool{},
+			rawToolCall: `<function=exec>
+<parameter=command>
+ls && echo "done"
+</parameter>
+</function>`,
+			wantToolCall: api.ToolCall{
+				Function: api.ToolCallFunction{
+					Name: "exec",
+					Arguments: map[string]any{
+						"command": "ls && echo \"done\"",
+					},
+				},
+			},
+		},
+		{
+			name:  "angle brackets in parameter values",
+			tools: []api.Tool{},
+			rawToolCall: `<function=exec>
+<parameter=command>
+ls && echo "a > b and a < b"
+</parameter>
+</function>`,
+			wantToolCall: api.ToolCall{
+				Function: api.ToolCallFunction{
+					Name: "exec",
+					Arguments: map[string]any{
+						"command": "ls && echo \"a > b and a < b\"",
+					},
+				},
+			},
+		},
 	}
 
 	for i, step := range steps {
@@ -798,6 +833,19 @@ celsius
 </parameter>
 </function>`,
 		},
+		{
+			desc: "ampersands in parameter values",
+			raw: `<function=get_current_temperature>
+		<parameter=location>
+		San Francisco & San Jose
+		</parameter>
+		</function>`,
+			want: `<function name="get_current_temperature">
+		<parameter name="location">
+		San Francisco &amp; San Jose
+		</parameter>
+		</function>`,
+		},
 	}
 
 	for _, tc := range cases {

server/routes.go

@@ -29,7 +29,6 @@ import (
 	"golang.org/x/sync/errgroup"
 
 	"github.com/ollama/ollama/api"
-	"github.com/ollama/ollama/auth"
 	"github.com/ollama/ollama/discover"
 	"github.com/ollama/ollama/envconfig"
 	"github.com/ollama/ollama/format"
@@ -251,18 +250,14 @@ func (s *Server) GenerateHandler(c *gin.Context) {
 		client := api.NewClient(remoteURL, http.DefaultClient)
 		err = client.Generate(c, &req, fn)
 		if err != nil {
-			var sErr api.AuthorizationError
-			if errors.As(err, &sErr) && sErr.StatusCode == http.StatusUnauthorized {
-				pk, pkErr := auth.GetPublicKey()
-				if pkErr != nil {
-					slog.Error("couldn't get public key", "error", pkErr)
-					c.JSON(http.StatusUnauthorized, gin.H{"error": "error getting public key"})
-					return
-				}
-				c.JSON(http.StatusUnauthorized, gin.H{
-					"error":      "unauthorized",
-					"public_key": pk,
-				})
+			var authError api.AuthorizationError
+			if errors.As(err, &authError) {
+				c.JSON(authError.StatusCode, gin.H{"error": "unauthorized", "public_key": authError.PublicKey})
+				return
+			}
+			var apiError api.StatusError
+			if errors.As(err, &apiError) {
+				c.JSON(apiError.StatusCode, apiError)
 				return
 			}
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
@@ -1813,18 +1808,14 @@ func (s *Server) ChatHandler(c *gin.Context) {
 		client := api.NewClient(remoteURL, http.DefaultClient)
 		err = client.Chat(c, &req, fn)
 		if err != nil {
-			var sErr api.AuthorizationError
-			if errors.As(err, &sErr) && sErr.StatusCode == http.StatusUnauthorized {
-				pk, pkErr := auth.GetPublicKey()
-				if pkErr != nil {
-					slog.Error("couldn't get public key", "error", pkErr)
-					c.JSON(http.StatusUnauthorized, gin.H{"error": "error getting public key"})
-					return
-				}
-				c.JSON(http.StatusUnauthorized, gin.H{
-					"error":      "unauthorized",
-					"public_key": pk,
-				})
+			var authError api.AuthorizationError
+			if errors.As(err, &authError) {
+				c.JSON(authError.StatusCode, gin.H{"error": "unauthorized", "public_key": authError.PublicKey})
+				return
+			}
+			var apiError api.StatusError
+			if errors.As(err, &apiError) {
+				c.JSON(apiError.StatusCode, apiError)
 				return
 			}
 			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})