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use error::Result;
use error::Error::ArgumentError;
use std::collections::BTreeMap;
pub const DEFAULT_PORT: u16 = 27017;
pub const URI_SCHEME: &'static str = "mongodb://";
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct Host {
pub host_name: String,
pub ipc: String,
pub port: u16,
}
impl Host {
fn new(host_name: String, port: u16) -> Host {
Host {
host_name: host_name,
port: port,
ipc: String::new(),
}
}
fn with_ipc(ipc: String) -> Host {
Host {
host_name: String::new(),
port: DEFAULT_PORT,
ipc: ipc,
}
}
pub fn has_ipc(&self) -> bool {
!self.ipc.is_empty()
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ConnectionOptions {
pub options: BTreeMap<String, String>,
pub read_pref_tags: Vec<String>,
}
impl ConnectionOptions {
pub fn new(options: BTreeMap<String, String>, read_pref_tags: Vec<String>) -> ConnectionOptions {
ConnectionOptions {
options: options,
read_pref_tags: read_pref_tags,
}
}
pub fn get(&self, key: &str) -> Option<&String> {
self.options.get(key)
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ConnectionString {
pub hosts: Vec<Host>,
pub string: Option<String>,
pub user: Option<String>,
pub password: Option<String>,
pub database: Option<String>,
pub collection: Option<String>,
pub options: Option<ConnectionOptions>,
}
impl ConnectionString {
pub fn new(host_name: &str, port: u16) -> ConnectionString {
let host = Host::new(host_name.to_string(), port);
ConnectionString::with_host(host)
}
fn with_host(host: Host) -> ConnectionString {
ConnectionString {
hosts: vec![host],
string: None,
user: None,
password: None,
database: Some("test".to_string()),
collection: None,
options: None,
}
}
}
pub fn parse(address: &str) -> Result<ConnectionString> {
if !address.starts_with(URI_SCHEME) {
return Err(ArgumentError("MongoDB connection string must start with \
'mongodb://'.".to_string()));
}
let addr = &address[URI_SCHEME.len()..];
let hosts: Vec<Host>;
let mut user: Option<String> = None;
let mut password: Option<String> = None;
let mut database: Option<String> = Some("test".to_string());
let mut collection: Option<String> = None;
let mut options: Option<ConnectionOptions> = None;
let (host_str, path_str) = if addr.contains(".sock") {
let (host_part, path_part) = rsplit(addr, ".sock");
if path_part.starts_with('/') {
(host_part, &path_part[1..])
} else {
(host_part, path_part)
}
} else {
partition(addr, "/")
};
if path_str.is_empty() && host_str.contains('?') {
return Err(ArgumentError("A '/' is required between the host list and any \
options.".to_string()));
}
if host_str.contains('@') {
let (user_info, host_string) = rpartition(host_str, "@");
let (u, p) = parse_user_info(user_info)?;
user = Some(u.to_string());
password = Some(p.to_string());
hosts = split_hosts(host_string)?;
} else {
hosts = split_hosts(host_str)?;
}
let mut opts = "";
if !path_str.is_empty() {
if path_str.starts_with('?') {
opts = &path_str[1..];
} else {
let (dbase, options) = partition(path_str, "?");
let (dbase_new, coll) = partition(dbase, ".");
database = Some(dbase_new.to_string());
collection = Some(coll.to_string());
opts = options;
}
}
if !opts.is_empty() {
options = Some(split_options(opts).unwrap());
}
Ok(ConnectionString {
hosts: hosts,
string: Some(address.to_string()),
user: user,
password: password,
database: database,
collection: collection,
options: options,
})
}
fn parse_user_info(user_info: &str) -> Result<(&str, &str)> {
let (user, password) = rpartition(user_info, ":");
if user_info.contains('@') || user.contains(':') {
return Err(ArgumentError("':' or '@' characters in a username or password \
must be escaped according to RFC 2396.".to_string()));
}
if user.is_empty() {
return Err(ArgumentError("The empty string is not a valid username.".to_string()));
}
Ok((user, password))
}
fn parse_ipv6_literal_host(entity: &str) -> Result<Host> {
match entity.find(']') {
Some(_) => {
match entity.find("]:") {
Some(idx) => {
let port = &entity[idx + 2..];
match port.parse::<u16>() {
Ok(val) => Ok(Host::new(entity[1..idx].to_ascii_lowercase(), val)),
Err(_) => Err(ArgumentError("Port must be an integer.".to_string())),
}
}
None => Ok(Host::new(entity[1..].to_ascii_lowercase(), DEFAULT_PORT)),
}
}
None => {
Err(ArgumentError("An IPv6 address must be enclosed in '[' and ']' \
according to RFC 2732.".to_string()))
}
}
}
pub fn parse_host(entity: &str) -> Result<Host> {
if entity.starts_with('[') {
parse_ipv6_literal_host(entity)
} else if entity.contains(':') {
let (host, port) = partition(entity, ":");
if port.contains(':') {
return Err(ArgumentError("Reserved characters such as ':' must
be escaped according to RFC 2396. An IPv6 address literal
must be enclosed in '[' and according to RFC 2732.".to_string()));
}
match port.parse::<u16>() {
Ok(val) => Ok(Host::new(host.to_ascii_lowercase(), val)),
Err(_) => Err(ArgumentError("Port must be an unsigned integer.".to_string())),
}
} else if entity.contains(".sock") {
Ok(Host::with_ipc(entity.to_ascii_lowercase()))
} else {
Ok(Host::new(entity.to_ascii_lowercase(), DEFAULT_PORT))
}
}
fn split_hosts(host_str: &str) -> Result<Vec<Host>> {
let mut hosts: Vec<Host> = Vec::new();
for entity in host_str.split(',') {
if entity.is_empty() {
return Err(ArgumentError("Empty host, or extra comma in host list.".to_string()));
}
let host = parse_host(entity)?;
hosts.push(host);
}
Ok(hosts)
}
fn parse_options(opts: &str, delim: Option<&str>) -> ConnectionOptions {
let mut options: BTreeMap<String, String> = BTreeMap::new();
let mut read_pref_tags: Vec<String> = Vec::new();
let opt_list = match delim {
Some(delim) => opts.split(delim).collect(),
None => vec![opts],
};
for opt in opt_list {
let (key, val) = partition(opt, "=");
if key.to_ascii_lowercase() == "readpreferencetags" {
read_pref_tags.push(val.to_string());
} else {
options.insert(key.to_string(), val.to_string());
}
}
ConnectionOptions::new(options, read_pref_tags)
}
fn split_options(opts: &str) -> Result<ConnectionOptions> {
let and_idx = opts.find('&');
let semi_idx = opts.find(';');
let mut delim = None;
if and_idx != None && semi_idx != None {
return Err(ArgumentError("Cannot mix '&' and ';' for option separators.".to_string()));
} else if and_idx != None {
delim = Some("&");
} else if semi_idx != None {
delim = Some(";");
} else if opts.find('=') == None {
return Err(ArgumentError("InvalidURI: MongoDB URI options are key=value \
pairs.".to_string()));
}
let options = parse_options(opts, delim);
Ok(options)
}
fn partition<'a>(string: &'a str, sep: &str) -> (&'a str, &'a str) {
match string.find(sep) {
Some(idx) => (&string[..idx], &string[idx + sep.len()..]),
None => (string, ""),
}
}
fn rpartition<'a>(string: &'a str, sep: &str) -> (&'a str, &'a str) {
match string.rfind(sep) {
Some(idx) => (&string[..idx], &string[idx + sep.len()..]),
None => (string, ""),
}
}
fn rsplit<'a>(string: &'a str, sep: &str) -> (&'a str, &'a str) {
match string.rfind(sep) {
Some(idx) => (&string[..idx + sep.len()], &string[idx + sep.len()..]),
None => (string, ""),
}
}