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Merge pull request #14169 from ahrtr/http_max_stream_20220628
Support configuring `MaxConcurrentStreams` for http2
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// Copyright 2022 The etcd Authors | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// http://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
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||
package flags | ||
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import ( | ||
"flag" | ||
"strconv" | ||
) | ||
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type uint32Value uint32 | ||
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// NewUint32Value creates an uint32 instance with the provided value. | ||
func NewUint32Value(v uint32) *uint32Value { | ||
val := new(uint32Value) | ||
*val = uint32Value(v) | ||
return val | ||
} | ||
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// Set parses a command line uint32 value. | ||
// Implements "flag.Value" interface. | ||
func (i *uint32Value) Set(s string) error { | ||
v, err := strconv.ParseUint(s, 0, 32) | ||
*i = uint32Value(v) | ||
return err | ||
} | ||
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func (i *uint32Value) String() string { return strconv.FormatUint(uint64(*i), 10) } | ||
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// Uint32FromFlag return the uint32 value of a flag with the given name | ||
func Uint32FromFlag(fs *flag.FlagSet, name string) uint32 { | ||
val := *fs.Lookup(name).Value.(*uint32Value) | ||
return uint32(val) | ||
} |
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// Copyright 2022 The etcd Authors | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// http://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
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package flags | ||
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import ( | ||
"flag" | ||
"testing" | ||
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"github.com/stretchr/testify/assert" | ||
) | ||
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func TestUint32Value(t *testing.T) { | ||
cases := []struct { | ||
name string | ||
s string | ||
expectedVal uint32 | ||
expectError bool | ||
}{ | ||
{ | ||
name: "normal uint32 value", | ||
s: "200", | ||
expectedVal: 200, | ||
}, | ||
{ | ||
name: "zero value", | ||
s: "0", | ||
expectedVal: 0, | ||
}, | ||
{ | ||
name: "negative int value", | ||
s: "-200", | ||
expectError: true, | ||
}, | ||
{ | ||
name: "invalid integer value", | ||
s: "invalid", | ||
expectError: true, | ||
}, | ||
} | ||
for _, tc := range cases { | ||
t.Run(tc.name, func(t *testing.T) { | ||
var val uint32Value | ||
err := val.Set(tc.s) | ||
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if tc.expectError { | ||
if err == nil { | ||
t.Errorf("Expected failure on parsing uint32 value from %s", tc.s) | ||
} | ||
} else { | ||
if err != nil { | ||
t.Errorf("Unexpected error when parsing %s: %v", tc.s, err) | ||
} | ||
assert.Equal(t, uint32(val), tc.expectedVal) | ||
} | ||
}) | ||
} | ||
} | ||
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func TestUint32FromFlag(t *testing.T) { | ||
const flagName = "max-concurrent-streams" | ||
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cases := []struct { | ||
name string | ||
defaultVal uint32 | ||
arguments []string | ||
expectedVal uint32 | ||
}{ | ||
{ | ||
name: "only default value", | ||
defaultVal: 15, | ||
arguments: []string{}, | ||
expectedVal: 15, | ||
}, | ||
{ | ||
name: "argument has different value from the default one", | ||
defaultVal: 16, | ||
arguments: []string{"--max-concurrent-streams", "200"}, | ||
expectedVal: 200, | ||
}, | ||
{ | ||
name: "argument has the same value from the default one", | ||
defaultVal: 105, | ||
arguments: []string{"--max-concurrent-streams", "105"}, | ||
expectedVal: 105, | ||
}, | ||
} | ||
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for _, tc := range cases { | ||
t.Run(tc.name, func(t *testing.T) { | ||
fs := flag.NewFlagSet("etcd", flag.ContinueOnError) | ||
fs.Var(NewUint32Value(tc.defaultVal), flagName, "Maximum concurrent streams that each client can open at a time.") | ||
if err := fs.Parse(tc.arguments); err != nil { | ||
t.Fatalf("Unexpected error: %v\n", err) | ||
} | ||
actualMaxStream := Uint32FromFlag(fs, flagName) | ||
assert.Equal(t, actualMaxStream, tc.expectedVal) | ||
}) | ||
} | ||
} |
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