for non-template-based output; it accepts strings, bytes, and dictionaries (dicts will be encoded as JSON). Many methods in RequestHandler are designed to be overridden in subclasses and be used throughout request. See the class definition for HTTPServerRequest for a complete list of attributes. Request data in the formats used by HTML forms will be parsed for you and is made available in methods like get_query_argument the files were uploaded with a form wrapper (i.e. a multipart/form-data Content-Type); if this format was not used the raw uploaded data is available in self.request.body. By default uploaded files are fully

for non-template-based output; it accepts strings, bytes, and dictionaries (dicts will be encoded as JSON). Many methods in RequestHandler are designed to be overridden in subclasses and be used throughout request. See the class definition for HTTPServerRequest for a complete list of attributes. Request data in the formats used by HTML forms will be parsed for you and is made available in methods like get_query_argument the files were uploaded with a form wrapper (i.e. a multipart/form-data Content-Type); if this format was not used the raw uploaded data is available in self.request.body. By default uploaded files are fully

error 现在我们已经了解了变量如何工作，让我们看看变量可以拥有的更多数据类型。 42/562Rust 程序设计语言 简体中文版 数据类型 在 Rust 中，每一个值都有一个特定 数据类型（data type），这告诉 Rust 它被指定为何种数 据，以便明确数据处理方式。我们将看到两类数据类型子集：标量（scalar）和复合 （compound）。 记住，Rust 是 静态类型（statically some_string.push_str(", world"); | ^^^^^^^^^^^ `some_string` is a `&` reference, so the data it refers to cannot be borrowed as mutable | help: consider changing this to be a mutable reference 防止同一时间对同一数据存在多个可变引 用。新 Rustacean 们经常难以适应这一点，因为大部分语言中变量任何时候都是可变的。这 个限制的好处是 Rust 可以在编译时就避免数据竞争。数据竞争（data race）类似于竞态条 件，它可由这三个行为造成： • 两个或更多指针同时访问同一数据。 • 至少有一个指针被用来写入数据。 • 没有同步数据访问的机制。 数据竞争会导致未定义行为，难以在运行时追踪，并且难以诊断和修复；Rust