use reqwest; // 定义一个自定义错误类型,可以保存 InvalidHeaderValue 或 reqwest::Error。 #[derive(Debug)] enum MyError { InvalidHeader(reqwest::header::InvalidHeaderValue), Reqwest(reqwest::Error), } impl From<reqwest::Error> for MyError { fn from(error: reqwest::Error) -> Self { MyErro...
Value 是 serde_json crate 中的,用来接收 POST 请求后返回的 JSON 数据。这点非常重要,在 GET 中接收 JSON 数据用的是 HashMap<String, String> ,在这里把 String 换成了 Value 是为了可以适用于多种类型,而不局限于String。 serde_json::value::Value支持的类列表如下: pubenumValue{ Nu...
其中函数bin_read_key中设置状态为conn_nread,使得状态机从网络读取指定字节的数据,用以SET或ADD或REPLACE对应的item数据。 static void bin_read_key(conn *c, enum bin_substates next_substate, int extra) { //... //... /* preserve the header in the buffer.. */ c->ritem = c->rcurr + ...
let key = &args[1]; let value = &args[2];let rs = self.engine.set(key.as_bytes(), value.as_bytes().to_vec()); match rs { Ok(_) => { eprintln!("OK"); } Err(err) => { eprintln!("{}", err.to_string()); } }if self.settings.is_show_affected() {...
pub fn set_previous_app(value: Option<String>) { let mut previous_app = PREVIOUS_APP.lock().unwrap(); *previous_app = value; }pub fn get_previous_app() -> Result<Option<String>, Error> { let previous_app = PREVIOUS_APP.lock().map_err(|_| Error::LockMutex)?;...
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最近改了游戏的网络层代码,运行 Android 版的时候 getaddrinfo 报错 Invalid value for ai_flags. ai_flags 设置如下: struct addrinfo hint = {0}; hint.ai_flags = AI_DEFAULT; 几经搜索,发现原来是 Android 的问题。 Android 和 FreeBSD 都有这个问题,对 AI_V4MAPPED 的支持有问题。
本文简要介绍rust语言中 std::option::Option.get_or_insert 的用法。用法pub fn get_or_insert(&mut self, value: T) -> &mut T 如果选项是 None ,则将 value 插入到选项中,然后返回对包含值的可变引用。 另请参阅 Option::insert ,即使选项已包含 Some ,它也会更新值。 例子 let mut x = None;...
A null value means the channel has no recorded creator, which is often because the channel is very old, or because it was created via a data import tool or management command. Changes: New in Zulip 9.0 (feature level 254). invite_only: boolean Specifies whether the channel is private or...
A null value means the channel has no recorded creator, which is often because the channel is very old, or because it was created via a data import tool or management command. Changes: New in Zulip 9.0 (feature level 254). invite_only: boolean Specifies whether the channel is private or...