lobo/aws-sdk-for-zig
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects 1 Releases Wiki Activity

Compare commits

base: lobo:8d36300f2726853872e825db07fed762514f145d
Branches Tags
lobo:master
lobo:zig-develop
lobo:0.11.0
lobo:0.11
lobo:0.9.0
lobo:aws-crt
lobo:xml
lobo:zig-0.12.0
lobo:v0.1
..
compare: lobo:d0dd2507d4ca7d20786cfc56432b00fd7e1cce7d
Branches Tags
lobo:master
lobo:zig-develop
lobo:0.11.0
lobo:0.11
lobo:0.9.0
lobo:aws-crt
lobo:xml
lobo:zig-0.12.0
lobo:v0.1

No commits in common. "8d36300f2726853872e825db07fed762514f145d" and "d0dd2507d4ca7d20786cfc56432b00fd7e1cce7d" have entirely different histories.
8d36300f27 ... d0dd2507d4

4 changed files with 16 additions and 614 deletions
Show Stats Expand all files Collapse all files

2
src/aws.zig
View File

@ -227,7 +227,7 @@ pub fn Request(comptime action: anytype) type {
// look at the return type
var isJson: bool = undefined;
for (response.headers) |h| {
if (std.ascii.eqlIgnoreCase("Content-Type", h.name)) {
if (std.mem.eql(u8, "Content-Type", h.name)) {
if (std.mem.startsWith(u8, h.value, "application/json")) {
isJson = true;
} else if (std.mem.startsWith(u8, h.value, "application/x-amz-json-1.0")) {

36
src/aws_http.zig
View File

@ -120,6 +120,7 @@ pub const AwsHttp = struct {
// End CreateRequest. This should return a struct with a deinit function that can do
// destroys, etc
// TODO: Add headers
try zfetch.init(); // This only does anything on Windows. Not sure how performant it is to do this on every request
defer zfetch.deinit();
var headers = zfetch.Headers.init(self.allocator);
@ -127,54 +128,41 @@ pub const AwsHttp = struct {
for (request.headers) |header|
try headers.appendValue(header.name, header.value);
try addHeaders(self.allocator, &headers, endpoint.host, request.body, request.content_type, request.headers);
log.debug("All Request Headers:", .{});
for (headers.list.items) |h|
log.debug("\t{s}: {s}", .{ h.name, h.value });
if (signing_config) |opts| try signing.signRequest(self.allocator, request, opts);
// TODO: Construct URL with endpoint and request info
var req = try zfetch.Request.init(self.allocator, "https://httpbin.org/post", null);
defer req.deinit();
// TODO: make req
const method = std.meta.stringToEnum(zfetch.Method, request.method).?;
try req.do(method, headers, if (request.body.len == 0) null else request.body);
// TODO: Construct URL with endpoint and request info
var req = try zfetch.Request.init(self.allocator, "https://www.lerch.org", null);
// TODO: http method as requested
// TODO: payload
try req.do(.GET, headers, null);
// TODO: Timeout - is this now above us?
log.debug("request_complete. Response code {d}: {s}", .{ req.status.code, req.status.reason });
log.debug("Response headers:", .{});
log.debug("headers:", .{});
var resp_headers = try std.ArrayList(Header).initCapacity(self.allocator, req.headers.list.items.len);
defer resp_headers.deinit();
var content_length: usize = 0;
for (req.headers.list.items) |h| {
log.debug(" {s}: {s}", .{ h.name, h.value });
resp_headers.appendAssumeCapacity(.{
.name = try (self.allocator.dupe(u8, h.name)),
.value = try (self.allocator.dupe(u8, h.value)),
});
if (content_length == 0 and std.ascii.eqlIgnoreCase("content-length", h.name))
content_length = std.fmt.parseInt(usize, h.value, 10) catch 0;
resp_headers.appendAssumeCapacity(.{ .name = h.name, .value = h.value });
}
const reader = req.reader();
// TODO: Get content length and use that to allocate the buffer
// Content length can be missing, and why would we trust it anyway
var buf: [65535]u8 = undefined;
var resp_payload = try std.ArrayList(u8).initCapacity(self.allocator, content_length);
defer resp_payload.deinit();
while (true) {
const read = try reader.read(&buf);
try resp_payload.appendSlice(buf[0..read]);
if (read == 0) break;
}
log.debug("raw response body:\n{s}", .{resp_payload.items});
log.debug("raw response body:\n{s}", .{buf});
// Headers would need to be allocated/copied into HttpResult similar
// to RequestContext, so we'll leave this as a later excercise
// if it becomes necessary
const rc = HttpResult{
.response_code = req.status.code,
.body = resp_payload.toOwnedSlice(),
.body = "change me", // TODO: work this all out
.headers = resp_headers.toOwnedSlice(),
.allocator = self.allocator,
};

511
src/aws_signing.zig
View File

@ -52,7 +52,7 @@ pub const Config = struct {
// In the CRT, this is only used if the body has been precalculated. We don't have
// this use case, and we'll ignore
// .signed_body_value = c.aws_byte_cursor_from_c_str(""),
signed_body_header: SignatureType = .sha256, // https://github.com/awslabs/aws-c-auth/blob/ace1311f8ef6ea890b26dd376031bed2721648eb/include/aws/auth/signing_config.h#L131
signed_body_header: enum { sha256, none } = .sha256, // https://github.com/awslabs/aws-c-auth/blob/ace1311f8ef6ea890b26dd376031bed2721648eb/include/aws/auth/signing_config.h#L131
// This is more complex in the CRT. We'll just take the creds. Someone
// else can use a provider and get them in advance
@ -61,11 +61,8 @@ pub const Config = struct {
// string, equal to the value specified here. If this value is zero or if header signing is being used then
// this parameter has no effect.
expiration_in_seconds: u64 = 0,
flags: ConfigFlags = .{},
};
pub const SignatureType = enum { sha256, none };
pub const SigningError = error{
NotImplemented,
};
@ -78,510 +75,6 @@ pub fn signRequest(allocator: std.mem.Allocator, http_request: base.Request, con
}
fn validateConfig(config: Config) SigningError!void {
if (config.signature_type != .headers or
config.signed_body_header != .sha256 or
config.expiration_in_seconds != 0 or
config.algorithm != .v4 or
!config.flags.omit_session_token or
!config.flags.should_normalize_uri_path or
!config.flags.use_double_uri_encode)
_ = config;
return SigningError.NotImplemented;
}
fn createCanonicalRequest(allocator: std.mem.Allocator, request: base.Request, config: Config) ![]const u8 {
// CanonicalRequest =
// HTTPRequestMethod + '\n' +
// CanonicalURI + '\n' +
// CanonicalQueryString + '\n' +
// CanonicalHeaders + '\n' +
// SignedHeaders + '\n' +
// HexEncode(Hash(RequestPayload))
const fmt =
\\{s}
\\{s}
\\{s}
\\{s}
\\{s}
\\{s}
;
// TODO: This is all better as a writer - less allocations/copying
const canonical_method = canonicalRequestMethod(request.method);
const canonical_url = try canonicalUri(allocator, request.path, config.flags.use_double_uri_encode);
defer allocator.free(canonical_url);
const canonical_query = try canonicalQueryString(allocator, request.path);
defer allocator.free(canonical_query);
const canonical_headers = try canonicalHeaders(allocator, request.headers);
defer allocator.free(canonical_headers.str);
defer allocator.free(canonical_headers.signed_headers);
const payload_hash = try hashPayload(allocator, request.body, config.signed_body_header);
defer allocator.free(payload_hash);
return try std.fmt.allocPrint(allocator, fmt, .{
canonical_method,
canonical_url,
canonical_query,
canonical_headers.str,
canonical_headers.signed_headers,
payload_hash,
});
}
fn canonicalRequestMethod(method: []const u8) ![]const u8 {
return method; // We assume it's good
}
fn canonicalUri(allocator: std.mem.Allocator, path: []const u8, double_encode: bool) ![]const u8 {
// Add the canonical URI parameter, followed by a newline character. The
// canonical URI is the URI-encoded version of the absolute path component
// of the URI, which is everything in the URI from the HTTP host to the
// question mark character ("?") that begins the query string parameters (if any).
//
// Normalize URI paths according to RFC 3986. Remove redundant and relative
// path components. Each path segment must be URI-encoded twice
// (except for Amazon S3 which only gets URI-encoded once).
//
// Note: In exception to this, you do not normalize URI paths for requests
// to Amazon S3. For example, if you have a bucket with an object
// named my-object//example//photo.user, use that path. Normalizing
// the path to my-object/example/photo.user will cause the request to
// fail. For more information, see Task 1: Create a Canonical Request in
// the Amazon Simple Storage Service API Reference.
//
// If the absolute path is empty, use a forward slash (/)
//
// For now, we will "Remove redundant and relative path components". This
// doesn't apply to S3 anyway, and we'll make it the callers's problem
if (!double_encode)
return error.S3NotImplemented;
if (path.len == 0 or path[0] == '?' or path[0] == '#')
return try allocator.dupe(u8, "/");
const encoded_once = try encodeUri(allocator, path);
if (!double_encode)
return encoded_once[0 .. std.mem.lastIndexOf(u8, encoded_once, "?") orelse encoded_once.len];
defer allocator.free(encoded_once);
const encoded_twice = try encodeUri(allocator, encoded_once);
return encoded_twice[0 .. std.mem.lastIndexOf(u8, encoded_twice, "?") orelse encoded_twice.len];
}
fn encodeParamPart(allocator: std.mem.Allocator, path: []const u8) ![]const u8 {
const unreserved_marks = "-_.!~*'()";
var encoded = try std.ArrayList(u8).initCapacity(allocator, path.len);
defer encoded.deinit();
for (path) |c| {
var should_encode = true;
for (unreserved_marks) |r|
if (r == c) {
should_encode = false;
break;
};
if (should_encode and std.ascii.isAlNum(c))
should_encode = false;
if (!should_encode) {
try encoded.append(c);
continue;
}
// Whatever remains, encode it
try encoded.append('%');
const hex = try std.fmt.allocPrint(allocator, "{s}", .{std.fmt.fmtSliceHexUpper(&[_]u8{c})});
defer allocator.free(hex);
try encoded.appendSlice(hex);
}
return encoded.toOwnedSlice();
}
fn encodeUri(allocator: std.mem.Allocator, path: []const u8) ![]const u8 {
const reserved_characters = ";,/?:@&=+$#";
const unreserved_marks = "-_.!~*'()";
var encoded = try std.ArrayList(u8).initCapacity(allocator, path.len);
defer encoded.deinit();
for (path) |c| {
var should_encode = true;
for (reserved_characters) |r|
if (r == c) {
should_encode = false;
break;
};
if (should_encode) {
for (unreserved_marks) |r|
if (r == c) {
should_encode = false;
break;
};
}
if (should_encode and std.ascii.isAlNum(c))
should_encode = false;
if (!should_encode) {
try encoded.append(c);
continue;
}
// Whatever remains, encode it
try encoded.append('%');
const hex = try std.fmt.allocPrint(allocator, "{s}", .{std.fmt.fmtSliceHexUpper(&[_]u8{c})});
defer allocator.free(hex);
try encoded.appendSlice(hex);
}
return encoded.toOwnedSlice();
}
fn canonicalQueryString(allocator: std.mem.Allocator, path: []const u8) ![]const u8 {
// To construct the canonical query string, complete the following steps:
//
// Sort the parameter names by character code point in ascending order.
// Parameters with duplicate names should be sorted by value. For example,
// a parameter name that begins with the uppercase letter F precedes a
// parameter name that begins with a lowercase letter b.
//
// URI-encode each parameter name and value according to the following rules:
//
// Do not URI-encode any of the unreserved characters that RFC 3986
// defines: A-Z, a-z, 0-9, hyphen ( - ), underscore ( _ ), period ( . ), and tilde ( ~ ).
//
// Percent-encode all other characters with %XY, where X and Y are
// hexadecimal characters (0-9 and uppercase A-F). For example, the
// space character must be encoded as %20 (not using '+', as some
// encoding schemes do) and extended UTF-8 characters must be in the
// form %XY%ZA%BC.
//
// Double-encode any equals ( = ) characters in parameter values.
//
// Build the canonical query string by starting with the first parameter
// name in the sorted list.
//
// For each parameter, append the URI-encoded parameter name, followed by
// the equals sign character (=), followed by the URI-encoded parameter
// value. Use an empty string for parameters that have no value.
//
// Append the ampersand character (&) after each parameter value, except
// for the last value in the list.
//
// One option for the query API is to put all request parameters in the query
// string. For example, you can do this for Amazon S3 to create a presigned
// URL. In that case, the canonical query string must include not only
// parameters for the request, but also the parameters used as part of the
// signing process—the hashing algorithm, credential scope, date, and signed
// headers parameters.
//
// The following example shows a query string that includes authentication
// information. The example is formatted with line breaks for readability, but
// the canonical query string must be one continuous line of text in your code.
const first_question = std.mem.indexOf(u8, path, "?");
if (first_question == null)
return try allocator.dupe(u8, "");
// We have a query string
const query = path[first_question.? + 1 ..];
// Split this by component
var portions = std.mem.split(u8, query, "&");
var sort_me = std.ArrayList([]const u8).init(allocator);
defer sort_me.deinit();
while (portions.next()) |item|
try sort_me.append(item);
std.sort.sort([]const u8, sort_me.items, {}, lessThanBinary);
var normalized = try std.ArrayList(u8).initCapacity(allocator, path.len);
defer normalized.deinit();
var first = true;
for (sort_me.items) |i| {
if (!first) try normalized.append('&');
first = false;
var first_equals = std.mem.indexOf(u8, i, "=");
if (first_equals == null) {
// Rare. This is "foo="
const normed_item = try encodeUri(allocator, i);
defer allocator.free(normed_item);
try normalized.appendSlice(i); // This should be encoded
try normalized.append('=');
continue;
}
// normal key=value stuff
const key = try encodeParamPart(allocator, i[0..first_equals.?]);
defer allocator.free(key);
const value = try encodeParamPart(allocator, i[first_equals.? + 1 ..]);
defer allocator.free(value);
// Double-encode any = in the value. But not anything else?
const weird_equals_in_value_thing = try replace(allocator, value, "%3D", "%253D");
defer allocator.free(weird_equals_in_value_thing);
try normalized.appendSlice(key);
try normalized.append('=');
try normalized.appendSlice(weird_equals_in_value_thing);
}
return normalized.toOwnedSlice();
}
fn replace(allocator: std.mem.Allocator, haystack: []const u8, needle: []const u8, replacement_value: []const u8) ![]const u8 {
var buffer = try allocator.alloc(u8, std.mem.replacementSize(u8, haystack, needle, replacement_value));
_ = std.mem.replace(u8, haystack, needle, replacement_value, buffer);
return buffer;
}
fn lessThanBinary(context: void, lhs: []const u8, rhs: []const u8) bool {
_ = context;
return std.mem.lessThan(u8, lhs, rhs);
}
const CanonicalHeaders = struct {
str: []const u8,
signed_headers: []const u8,
};
fn canonicalHeaders(allocator: std.mem.Allocator, headers: []base.Header) !CanonicalHeaders {
//
// Doc example. Original:
//
// Host:iam.amazonaws.com\n
// Content-Type:application/x-www-form-urlencoded; charset=utf-8\n
// My-header1: a b c \n
// X-Amz-Date:20150830T123600Z\n
// My-Header2: "a b c" \n
//
// Canonical form:
// content-type:application/x-www-form-urlencoded; charset=utf-8\n
// host:iam.amazonaws.com\n
// my-header1:a b c\n
// my-header2:"a b c"\n
// x-amz-date:20150830T123600Z\n
var dest = try allocator.alloc(base.Header, headers.len);
defer {
for (dest) |h| {
allocator.free(h.name);
allocator.free(h.value);
}
allocator.free(dest);
}
var total_len: usize = 0;
var total_name_len: usize = 0;
for (headers) |h, i| {
total_len += (h.name.len + h.value.len + 2);
total_name_len += (h.name.len + 1);
const value = try canonicalHeaderValue(allocator, h.value);
defer allocator.free(value);
dest[i] = .{
.name = try std.ascii.allocLowerString(allocator, h.name),
.value = try std.fmt.allocPrint(allocator, "{s}", .{value}),
};
}
std.sort.sort(base.Header, dest, {}, lessThan);
var dest_str = try std.ArrayList(u8).initCapacity(allocator, total_len);
defer dest_str.deinit();
var signed_headers = try std.ArrayList(u8).initCapacity(allocator, total_name_len);
defer signed_headers.deinit();
var first = true;
for (dest) |h| {
dest_str.appendSliceAssumeCapacity(h.name);
dest_str.appendAssumeCapacity(':');
dest_str.appendSliceAssumeCapacity(h.value);
dest_str.appendAssumeCapacity('\n');
if (!first) signed_headers.appendAssumeCapacity(';');
first = false;
signed_headers.appendSliceAssumeCapacity(h.name);
}
return CanonicalHeaders{
.str = dest_str.toOwnedSlice(),
.signed_headers = signed_headers.toOwnedSlice(),
};
}
fn canonicalHeaderValue(allocator: std.mem.Allocator, value: []const u8) ![]const u8 {
var started = false;
var in_quote = false;
var start: usize = 0;
const rc = try allocator.alloc(u8, value.len);
var rc_inx: usize = 0;
for (value) |c, i| {
if (!started and !std.ascii.isSpace(c)) {
started = true;
start = i;
}
if (started) {
if (!in_quote and i > 0 and std.ascii.isSpace(c) and std.ascii.isSpace(value[i - 1]))
continue;
// if (c == '"') in_quote = !in_quote;
rc[rc_inx] = c;
rc_inx += 1;
}
}
// Trim end
while (std.ascii.isSpace(rc[rc_inx - 1]))
rc_inx -= 1;
return rc[0..rc_inx];
}
fn lessThan(context: void, lhs: base.Header, rhs: base.Header) bool {
_ = context;
return std.ascii.lessThanIgnoreCase(lhs.name, rhs.name);
}
fn hashPayload(allocator: std.mem.Allocator, payload: []const u8, sig_type: SignatureType) ![]const u8 {
if (sig_type != .sha256)
return error.NotImplemented;
const to_hash = blk: {
if (payload.len > 0) {
break :blk payload;
}
break :blk "";
};
var out: [std.crypto.hash.sha2.Sha256.digest_length]u8 = undefined;
std.crypto.hash.sha2.Sha256.hash(to_hash, &out, .{});
return try std.fmt.allocPrint(allocator, "{s}", .{std.fmt.fmtSliceHexLower(&out)});
}
// SignedHeaders + '\n' +
// HexEncode(Hash(RequestPayload))
test "canonical method" {
const actual = try canonicalRequestMethod("GET");
try std.testing.expectEqualStrings("GET", actual);
}
test "canonical uri" {
const allocator = std.testing.allocator;
const path = "/documents and settings/?foo=bar";
const expected = "/documents%2520and%2520settings/";
const actual = try canonicalUri(allocator, path, true);
defer allocator.free(actual);
try std.testing.expectEqualStrings(expected, actual);
const slash = try canonicalUri(allocator, "", true);
defer allocator.free(slash);
try std.testing.expectEqualStrings("/", slash);
}
test "canonical query" {
const allocator = std.testing.allocator;
const path = "blahblahblah?foo=bar&zed=dead&qux&equals=x=y&Action=ListUsers&Version=2010-05-08";
// {
// // TODO: Remove block
// std.testing.log_level = .debug;
// _ = try std.io.getStdErr().write("\n");
// }
const expected = "Action=ListUsers&Version=2010-05-08&equals=x%253Dy&foo=bar&qux=&zed=dead";
const actual = try canonicalQueryString(allocator, path);
defer allocator.free(actual);
try std.testing.expectEqualStrings(expected, actual);
}
test "canonical headers" {
const allocator = std.testing.allocator;
var headers = try std.ArrayList(base.Header).initCapacity(allocator, 5);
defer headers.deinit();
try headers.append(.{ .name = "Host", .value = "iam.amazonaws.com" });
try headers.append(.{ .name = "Content-Type", .value = "application/x-www-form-urlencoded; charset=utf-8" });
try headers.append(.{ .name = "My-header1", .value = " a b c " });
try headers.append(.{ .name = "X-Amz-Date", .value = "20150830T123600Z" });
try headers.append(.{ .name = "My-header2", .value = " \"a b c\" " });
const expected =
\\content-type:application/x-www-form-urlencoded; charset=utf-8
\\host:iam.amazonaws.com
\\my-header1:a b c
\\my-header2:"a b c"
\\x-amz-date:20150830T123600Z
\\
;
// {
// // TODO: Remove block
// std.testing.log_level = .debug;
// _ = try std.io.getStdErr().write("\n");
// }
const actual = try canonicalHeaders(allocator, headers.items);
defer allocator.free(actual.str);
defer allocator.free(actual.signed_headers);
try std.testing.expectEqualStrings(expected, actual.str);
try std.testing.expectEqualStrings("content-type;host;my-header1;my-header2;x-amz-date", actual.signed_headers);
}
test "canonical request" {
const allocator = std.testing.allocator;
var headers = try std.ArrayList(base.Header).initCapacity(allocator, 5);
defer headers.deinit();
try headers.append(.{ .name = "Content-Type", .value = "application/x-www-form-urlencoded" });
try headers.append(.{ .name = "Content-Length", .value = "43" });
try headers.append(.{ .name = "User-Agent", .value = "zig-aws 1.0, Powered by the AWS Common Runtime." });
try headers.append(.{ .name = "Host", .value = "sts.us-west-2.amazonaws.com" });
try headers.append(.{ .name = "Accept", .value = "application/json" });
const req = base.Request{
.path = "/",
.query = "",
.body = "Action=GetCallerIdentity&Version=2011-06-15",
.method = "POST",
.content_type = "application/json",
.headers = headers.items,
};
{
// TODO: Remove block
std.testing.log_level = .debug;
_ = try std.io.getStdErr().write("\n");
}
const request = try createCanonicalRequest(allocator, req, .{
.region = "us-west-2", // us-east-1
.service = "sts", // service
.credentials = .{
.access_key = "AKIDEXAMPLE",
.secret_key = "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
.session_token = null,
},
.signing_time = 1642187728, // Should be 2015-08-30T12:36:00Z. Does zig stdlib have date parsing?
});
defer allocator.free(request);
std.log.debug("canonical request:\n{s}", .{request});
try std.testing.expect(request.len > 0); // TODO: improvify this
}
test "can sign" {
// [debug] (aws): call: prefix sts, sigv4 sts, version 2011-06-15, action GetCallerIdentity
// [debug] (aws): proto: AwsProtocol.query
// [debug] (awshttp): host: sts.us-west-2.amazonaws.com, scheme: https, port: 443
// [debug] (awshttp): Calling endpoint https://sts.us-west-2.amazonaws.com
// [debug] (awshttp): Path: /
// [debug] (awshttp): Query:
// [debug] (awshttp): Method: POST
// [debug] (awshttp): body length: 43
// [debug] (awshttp): Body
// ====
// Action=GetCallerIdentity&Version=2011-06-15
// ====
// [debug] (awshttp): All Request Headers:
// [debug] (awshttp): Accept: application/json
// [debug] (awshttp): Host: sts.us-west-2.amazonaws.com
// [debug] (awshttp): User-Agent: zig-aws 1.0, Powered by the AWS Common Runtime.
// [debug] (awshttp): Content-Type: application/x-www-form-urlencoded
// [debug] (awshttp): Content-Length: 43
const allocator = std.testing.allocator;
var headers = try std.ArrayList(base.Header).initCapacity(allocator, 5);
defer headers.deinit();
try headers.append(.{ .name = "Content-Type", .value = "application/x-www-form-urlencoded" });
try headers.append(.{ .name = "Content-Length", .value = "43" });
try headers.append(.{ .name = "User-Agent", .value = "zig-aws 1.0, Powered by the AWS Common Runtime." });
try headers.append(.{ .name = "Host", .value = "sts.us-west-2.amazonaws.com" });
try headers.append(.{ .name = "Accept", .value = "application/json" });
const req = base.Request{
.path = "/",
.query = "",
.body = "Action=GetCallerIdentity&Version=2011-06-15",
.method = "POST",
.content_type = "application/json",
.headers = headers.items,
};
{
// TODO: Remove block
std.testing.log_level = .debug;
_ = try std.io.getStdErr().write("\n");
}
// we could look at sigv4 signing tests at:
// https://github.com/awslabs/aws-c-auth/blob/ace1311f8ef6ea890b26dd376031bed2721648eb/tests/sigv4_signing_tests.c#L1478
//
// for valid signatures. TODO: Get literally anything working first
try signRequest(allocator, req, .{
.region = "us-west-2", // us-east-1
.service = "sts", // service
.credentials = .{
.access_key = "AKIDEXAMPLE",
.secret_key = "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
.session_token = null,
},
.signing_time = 1642187728, // Should be 2015-08-30T12:36:00Z. Does zig stdlib have date parsing?
});
}

79
src/date.zig
View File

@ -1,79 +0,0 @@
// From https://gist.github.com/WoodyAtHome/3ef50b17f0fa2860ac52b97af12f8d15
// Translated from German. We don't need any local time for this use case, and conversion
// really requires the TZ DB.
const std = @import("std");
pub const DateTime = struct { day: u8, month: u8, year: u16, hour: u8, minute: u8, second: u8 };
pub fn timestamp2DateTime(timestamp: i64) DateTime {
// aus https://de.wikipedia.org/wiki/Unixzeit
const unixtime = @intCast(u64, timestamp);
const SECONDS_PER_DAY = 86400; //* 24* 60 * 60 */
const DAYS_PER_YEAR = 365; //* Normal year (no leap year) */
const DAYS_IN_4_YEARS = 1461; //* 4*365 + 1 */
const DAYS_IN_100_YEARS = 36524; //* 100*365 + 25 - 1 */
const DAYS_IN_400_YEARS = 146097; //* 400*365 + 100 - 4 + 1 */
const DAY_NUMBER_ADJUSTED_1970_01_01 = 719468; //* Day number relates to March 1st */
var dayN: u64 = DAY_NUMBER_ADJUSTED_1970_01_01 + unixtime / SECONDS_PER_DAY;
var seconds_since_midnight: u64 = unixtime % SECONDS_PER_DAY;
var temp: u64 = 0;
// Leap year rules for Gregorian Calendars
// Any year divisible by 100 is not a leap year unless also divisible by 400
temp = 4 * (dayN + DAYS_IN_100_YEARS + 1) / DAYS_IN_400_YEARS - 1;
var year = @intCast(u16, 100 * temp);
dayN -= DAYS_IN_100_YEARS * temp + temp / 4;
// For Julian calendars, each year divisible by 4 is a leap year
temp = 4 * (dayN + DAYS_PER_YEAR + 1) / DAYS_IN_4_YEARS - 1;
year += @intCast(u16, temp);
dayN -= DAYS_PER_YEAR * temp + temp / 4;
// TagN calculates the days of the year in relation to March 1
var month = @intCast(u8, (5 * dayN + 2) / 153);
var day = @intCast(u8, dayN - (@intCast(u64, month) * 153 + 2) / 5 + 1);
// 153 = 31+30+31+30+31 Days for the 5 months from March through July
// 153 = 31+30+31+30+31 Days for the 5 months from August through December
// 31+28 Days for January and February (see below)
// +2: Rounding adjustment
// +1: The first day in March is March 1st (not March 0)
month += 3; // Convert from the day that starts on March 1st, to a human year */
if (month > 12) { // months 13 and 14 become 1 (January) und 2 (February) of the next year
month -= 12;
year += 1;
}
var hours = @intCast(u8, seconds_since_midnight / 3600);
var minutes = @intCast(u8, seconds_since_midnight % 3600 / 60);
var seconds = @intCast(u8, seconds_since_midnight % 60);
return DateTime{ .day = day, .month = month, .year = year, .hour = hours, .minute = minutes, .second = seconds };
}
pub fn printDateTime(dt: DateTime) void {
std.log.debug("{:0>4}-{:0>2}-{:0>2}T{:0>2}:{:0>2}:{:0<2}Z", .{
dt.year,
dt.month,
dt.day,
dt.hour,
dt.minute,
dt.second,
});
}
pub fn printNowUtc() void {
printDateTime(timestamp2DateTime(std.time.timestamp()));
}
test "GMT and localtime" {
std.testing.log_level = .debug;
std.log.debug("\n", .{});
printDateTime(timestamp2DateTime(std.time.timestamp()));
try std.testing.expectEqual(DateTime{ .year = 2020, .month = 8, .day = 28, .hour = 9, .minute = 32, .second = 27 }, timestamp2DateTime(1598607147));
try std.testing.expectEqual(DateTime{ .year = 2020, .month = 11, .day = 1, .hour = 5, .minute = 6, .second = 7 }, timestamp2DateTime(1604207167));
}