Method Parse

internal/stats/user_agent_parser.go:72–110

Parse 解析UserAgent

(userAgent string)

// Parse 解析UserAgent
func (this *UserAgentParser) Parse(userAgent string) (result UserAgentParserResult) {
	// 限制长度
	if len(userAgent) == 0 || len(userAgent) > 256 {
		return
	}

	var userAgentKey = fnv.HashString(userAgent)
	var shardingIndex = int(userAgentKey % userAgentShardingCount)

	this.mu.RLock(shardingIndex)
	cacheResult, ok := this.cacheMaps[shardingIndex][userAgentKey]
	if ok {
		this.mu.RUnlock(shardingIndex)
		return cacheResult
	}
	this.mu.RUnlock(shardingIndex)

	var parser = this.pool.Get().(*useragent.UserAgent)
	parser.Parse(userAgent)
	result.OS = parser.OSInfo()
	result.BrowserName, result.BrowserVersion = parser.Browser()
	result.IsMobile = parser.Mobile()
	this.pool.Put(parser)

	// 忽略特殊字符
	if len(result.BrowserName) > 0 {
		for _, r := range result.BrowserName {
			if r == '$' || r == '"' || r == '\'' || r == '<' || r == '>' || r == ')' {
				return
			}
		}
	}

	this.mu.Lock(shardingIndex)
	this.cacheMaps[shardingIndex][userAgentKey] = result
	this.mu.Unlock(shardingIndex)

	return
}

// MaxCacheItems 读取能容纳的缓存最大数量
func (this *UserAgentParser) MaxCacheItems() int {