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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fluent-bit/flb_output_plugin.h>
#include <fluent-bit/flb_base64.h>
#include <fluent-bit/flb_time.h>
#include <fluent-bit/flb_sds.h>
#include <math.h>
#include "azure_blob.h"
#include "azure_blob_conf.h"
#include "azure_blob_uri.h"
#include "azure_blob_http.h"
flb_sds_t azb_block_blob_uri(struct flb_azure_blob *ctx, char *tag,
char *blockid, uint64_t ms)
{
int len;
flb_sds_t uri;
char *ext;
char *encoded_blockid;
len = strlen(blockid);
encoded_blockid = azb_uri_encode(blockid, len);
if (!encoded_blockid) {
return NULL;
}
uri = azb_uri_container(ctx);
if (!uri) {
flb_sds_destroy(encoded_blockid);
return NULL;
}
if (ctx->compress_blob == FLB_TRUE) {
ext = ".gz";
}
else {
ext = "";
}
if (ctx->path) {
flb_sds_printf(&uri, "/%s/%s.%" PRIu64 "%s?blockid=%s&comp=block",
ctx->path, tag, ms, ext, encoded_blockid);
}
else {
flb_sds_printf(&uri, "/%s.%" PRIu64 "%s?blockid=%s&comp=block",
tag, ms, ext, encoded_blockid);
}
flb_sds_destroy(encoded_blockid);
return uri;
}
flb_sds_t azb_block_blob_uri_commit(struct flb_azure_blob *ctx,
char *tag, uint64_t ms)
{
char *ext;
flb_sds_t uri;
uri = azb_uri_container(ctx);
if (!uri) {
return NULL;
}
if (ctx->compress_blob == FLB_TRUE) {
ext = ".gz";
}
else {
ext = "";
}
if (ctx->path) {
flb_sds_printf(&uri, "/%s/%s.%" PRIu64 "%s?comp=blocklist", ctx->path, tag,
ms, ext);
}
else {
flb_sds_printf(&uri, "/%s.%" PRIu64 "%s?comp=blocklist", tag, ms, ext);
}
return uri;
}
/* Generate a block id */
char *azb_block_blob_id(uint64_t *ms)
{
int len;
int ret;
double now;
char tmp[32];
size_t size;
size_t o_len;
char *b64;
struct flb_time tm;
/* Get current time */
flb_time_get(&tm);
/*
* Set outgoing time in milliseconds: this is used as a suffix for the
* block name
*/
*ms = ((tm.tm.tv_sec * 1000) + (tm.tm.tv_nsec / 1000000));
/* Convert time to double to format the block id */
now = flb_time_to_double(&tm);
len = snprintf(tmp, sizeof(tmp), "flb-%.4f.id", now);
/* Allocate space for the outgoing base64 buffer */
size = (4 * ceil(((double) len / 3) + 1));
b64 = flb_malloc(size);
if (!b64) {
return NULL;
}
/* base64 encode block id */
ret = flb_base64_encode((unsigned char *) b64, size, &o_len,
(unsigned char *) tmp, len);
if (ret != 0) {
flb_free(b64);
return NULL;
}
return b64;
}
int azb_block_blob_commit(struct flb_azure_blob *ctx, char *blockid, char *tag,
uint64_t ms)
{
int ret;
size_t b_sent;
flb_sds_t uri = NULL;
flb_sds_t payload;
struct flb_http_client *c;
struct flb_connection *u_conn;
/* Get upstream connection */
u_conn = flb_upstream_conn_get(ctx->u);
if (!u_conn) {
flb_plg_error(ctx->ins,
"cannot create upstream connection for blockblob commit");
return FLB_RETRY;
}
/* Compose commit URI */
uri = azb_block_blob_uri_commit(ctx, tag, ms);
if (!uri) {
flb_upstream_conn_release(u_conn);
return FLB_ERROR;
}
payload = flb_sds_create_size(256);
if (!payload) {
flb_sds_destroy(uri);
flb_upstream_conn_release(u_conn);
return FLB_ERROR;
}
flb_sds_printf(&payload,
"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
"<BlockList>"
" <Latest>%s</Latest>"
"</BlockList>",
blockid);
/* Create HTTP client context */
c = flb_http_client(u_conn, FLB_HTTP_PUT,
uri,
payload, flb_sds_len(payload), NULL, 0, NULL, 0);
if (!c) {
flb_plg_error(ctx->ins, "cannot create HTTP client context");
flb_sds_destroy(payload);
flb_sds_destroy(uri);
flb_upstream_conn_release(u_conn);
return FLB_RETRY;
}
/* Prepare headers and authentication */
azb_http_client_setup(ctx, c, flb_sds_len(payload),
FLB_FALSE,
AZURE_BLOB_CT_NONE, AZURE_BLOB_CE_NONE);
/* Send HTTP request */
ret = flb_http_do(c, &b_sent);
flb_sds_destroy(uri);
flb_sds_destroy(payload);
/* Validate HTTP status */
if (ret == -1) {
flb_plg_error(ctx->ins, "error sending append_blob");
return FLB_RETRY;
}
if (c->resp.status == 201) {
flb_plg_info(ctx->ins, "blob id %s committed successfully", blockid);
flb_http_client_destroy(c);
flb_upstream_conn_release(u_conn);
return FLB_OK;
}
else if (c->resp.status == 404) {
flb_plg_info(ctx->ins, "blob not found: %s", c->uri);
flb_http_client_destroy(c);
flb_upstream_conn_release(u_conn);
return FLB_RETRY;
}
else if (c->resp.payload_size > 0) {
flb_plg_error(ctx->ins, "cannot commit blob id %s\n%s",
blockid, c->resp.payload);
if (strstr(c->resp.payload, "must be 0 for Create Append")) {
flb_http_client_destroy(c);
flb_upstream_conn_release(u_conn);
return FLB_RETRY;
}
}
else {
flb_plg_error(ctx->ins, "cannot append content to blob");
}
flb_http_client_destroy(c);
flb_upstream_conn_release(u_conn);
return FLB_OK;
}
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