<commit_before>package S3::REST::Auth;
use 5.006;
use strict;
use warnings;
use Carp qw< croak >;
use Digest::SHA qw< hmac_sha1 >;
use URI::Escape qw< uri_escape >;
use MIME::Base64 qw< encode_base64 >;

# for more info, see:
#
#     http://s3.amazonaws.com/doc/s3-developer-guide/RESTAuthentication.html
#

our $VERSION = '0.1';

sub COMMON_ATTRS () {
    qw< secret_key access_key expire_seconds method bucket scheme >
};

sub AMAZON_S3_HOST () { "s3.amazonaws.com" }

# defaults
sub _dfl_attr_secret_key { $ENV{S3_SECRET_KEY} || die "no secret key" }
sub _dfl_attr_access_key { $ENV{S3_ACCESS_KEY} || die "no access key" }
sub _dfl_attr_bucket { $ENV{S3_BUCKET} || '' }
sub _dfl_attr_expire_seconds { 30 }
sub _dfl_attr_method { 'GET' }
sub _dfl_attr_scheme { 'https' }

# create getters
do {
    no strict 'refs';
    my $method = $_;
    *{$method} = sub {
        my($self, @bad) = @_;
        croak "method $method is a getter"
            if @bad;
        return ($self->{$method} && ref $self->{$method} eq 'CODE')
            ? $self->{$method}->()
            : $self->{$method};
    };
} for COMMON_ATTRS;

sub new {
    my($class, $args, @bad) = @_;
    croak "too many arguments passed"
        if @bad;
    $args ||= {};
    my %self = map {
        $_ => ((delete $args->{$_}) // $class->can("_dfl_attr_$_")->())
    } COMMON_ATTRS;
    die "unknown named arguments given: @{[sort keys %$args]}"
        if keys %$args;
    return bless {%self}, $class;
}

# only here b/c I dont like having to override CORE::GLOBAL::time in tests
sub _seconds_into_the_future {
    my($class, $seconds) = @_;
    return time() + $seconds;
}

sub TemporaryURL {
    my($self, $path, $expire_seconds, @bad) = @_;
    croak "too many arguments passed"
        if @bad;
    $self = $self->new()
        unless ref $self;
    croak "path is required"
        unless $path && length $path;

    $path = "/$path"
        unless $path =~ m|^/|;

    $expire_seconds ||= $self->expire_seconds();

    my $bucket = $self->bucket();

    my $signbucket = $bucket ? "/$bucket" : '';
    my $signpath = "$signbucket$path";

    my $then = $self->_seconds_into_the_future( $expire_seconds );

    my $material = join("\n",<commit_msg>fixed potential modification of callers data in constructor<commit_after>package S3::REST::Auth;
use 5.006;
use strict;
use warnings;
use Carp qw< croak >;
use Digest::SHA qw< hmac_sha1 >;
use URI::Escape qw< uri_escape >;
use MIME::Base64 qw< encode_base64 >;

# for more info, see:
#
#     http://s3.amazonaws.com/doc/s3-developer-guide/RESTAuthentication.html
#

our $VERSION = '0.1';

sub COMMON_ATTRS () {
    qw< secret_key access_key expire_seconds method bucket scheme >
};

sub AMAZON_S3_HOST () { "s3.amazonaws.com" }

# defaults
sub _dfl_attr_secret_key { $ENV{S3_SECRET_KEY} || die "no secret key" }
sub _dfl_attr_access_key { $ENV{S3_ACCESS_KEY} || die "no access key" }
sub _dfl_attr_bucket { $ENV{S3_BUCKET} || '' }
sub _dfl_attr_expire_seconds { 30 }
sub _dfl_attr_method { 'GET' }
sub _dfl_attr_scheme { 'https' }

# create getters
do {
    no strict 'refs';
    my $method = $_;
    *{$method} = sub {
        my($self, @bad) = @_;
        croak "method $method is a getter"
            if @bad;
        return ($self->{$method} && ref $self->{$method} eq 'CODE')
            ? $self->{$method}->()
            : $self->{$method};
    };
} for COMMON_ATTRS;

sub new {
    my($class, $args, @bad) = @_;
    croak "too many arguments passed"
        if @bad;
    my %args = %{$args||{}};
    my %self = map {
        $_ => ((delete $args{$_}) // $class->can("_dfl_attr_$_")->())
    } COMMON_ATTRS;
    die "unknown named arguments given: @{[sort keys %args]}"
        if keys %args;
    return bless {%self}, $class;
}

# only here b/c I dont like having to override CORE::GLOBAL::time in tests
sub _seconds_into_the_future {
    my($class, $seconds) = @_;
    return time() + $seconds;
}

sub TemporaryURL {
    my($self, $path, $expire_seconds, @bad) = @_;
    croak "too many arguments passed"
        if @bad;
    $self = $self->new()
        unless ref $self;
    croak "path is required"
        unless $path && length $path;

    $path = "/$path"
        unless $path =~ m|^/|;

    $expire_seconds ||= $self->expire_seconds();

    my $bucket = $self->bucket();

    my $signbucket = $bucket ? "/$bucket" : '';
    my $signpath = "$signbucket$path";

    my $then = $self->_seconds_into_the_future( $expire_seconds );

    my $material = join("\n",
{'fraction_non_alphanumeric': 0.1646273637374861, 'fraction_numerical': 0.009343715239154617, 'mean_word_length': 3.035906642728905, 'pattern_counts': {'":': 0, '<': 13, '<?xml version=': 0, '>': 38, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '7444227', 'n_tokens_mistral': 1674, 'n_tokens_neox': 1637, 'n_words': 418}