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MultipartSerializer.swift
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MultipartSerializer.swift
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import struct NIO.ByteBufferAllocator
/// Serializes `MultipartForm`s to `Data`.
///
/// See `MultipartParser` for more information about the multipart encoding.
public final class MultipartSerializer {
/// Creates a new `MultipartSerializer`.
public init() { }
public func serialize(parts: [MultipartPart], boundary: String) throws -> String {
var buffer = ByteBufferAllocator().buffer(capacity: 0)
try self.serialize(parts: parts, boundary: boundary, into: &buffer)
return String(decoding: buffer.readableBytesView, as: UTF8.self)
}
/// Serializes the `MultipartForm` to data.
///
/// let data = try MultipartSerializer().serialize(parts: [part], boundary: "123")
/// print(data) // multipart-encoded
///
/// - parameters:
/// - parts: One or more `MultipartPart`s to serialize into `Data`.
/// - boundary: Multipart boundary to use for encoding. This must not appear anywhere in the encoded data.
/// - throws: Any errors that may occur during serialization.
/// - returns: `multipart`-encoded `Data`.
public func serialize(parts: [MultipartPart], boundary: String, into buffer: inout ByteBuffer) throws {
for part in parts {
buffer.writeString("--")
buffer.writeString(boundary)
buffer.writeString("\r\n")
for (key, val) in part.headers {
buffer.writeString(key)
buffer.writeString(": ")
buffer.writeString(val)
buffer.writeString("\r\n")
}
buffer.writeString("\r\n")
var body = part.body
buffer.writeBuffer(&body)
buffer.writeString("\r\n")
}
buffer.writeString("--")
buffer.writeString(boundary)
buffer.writeString("--\r\n")
}
}