133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "ipfs/importer/importer.h"
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#include "ipfs/merkledag/merkledag.h"
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#include "ipfs/repo/fsrepo/fs_repo.h"
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#include "ipfs/unixfs/unixfs.h"
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#define MAX_DATA_SIZE 262144 // 1024 * 256;
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/***
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* Imports OS files into the datastore
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*/
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/**
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* read the next chunk of bytes, create a node, and add a link to the node in the passed-in node
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* @param file the file handle
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* @param node the node to add to
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* @returns number of bytes read
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*/
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size_t ipfs_import_chunk(FILE* file, struct Node* parent_node, struct FSRepo* fs_repo, size_t* total_size) {
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unsigned char buffer[MAX_DATA_SIZE];
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size_t bytes_read = fread(buffer, 1, MAX_DATA_SIZE, file);
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// create a new node
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struct Node* new_node = NULL;
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ipfs_node_new_from_data(buffer, bytes_read, &new_node);
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// persist
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ipfs_merkledag_add(new_node, fs_repo);
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// put link in parent node
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struct NodeLink* new_link = NULL;
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ipfs_node_link_create("", new_node->hash, new_node->hash_size, &new_link);
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new_link->t_size = new_node->data_size;
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*total_size += new_link->t_size;
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ipfs_node_add_link(parent_node, new_link);
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ipfs_node_free(new_node);
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// save the parent_node if it is time...
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if (bytes_read != MAX_DATA_SIZE) {
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// build UnixFS for file
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struct UnixFS* unix_fs;
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if (ipfs_unixfs_new(&unix_fs) == 0) {
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return 0;
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}
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unix_fs->data_type = UNIXFS_FILE;
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unix_fs->file_size = *total_size;
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// now encode unixfs and put in parent_node->data
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size_t temp_size = ipfs_unixfs_protobuf_encode_size(unix_fs);
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unsigned char temp[temp_size];
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size_t bytes_written;
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if (ipfs_unixfs_protobuf_encode(unix_fs, temp, temp_size, &bytes_written) == 0) {
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ipfs_unixfs_free(unix_fs);
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return 0;
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}
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parent_node->data_size = bytes_written;
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parent_node->data = (unsigned char*)malloc(bytes_written);
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if (parent_node->data == NULL) {
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ipfs_unixfs_free(unix_fs);
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return 0;
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}
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memcpy(parent_node->data, temp, bytes_written);
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// persist the main node
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ipfs_merkledag_add(parent_node, fs_repo);
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}
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return bytes_read;
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}
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/**
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* Creates a node based on an incoming file
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* @param file_name the file to import
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* @param parent_node the root node (has links to others)
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* @returns true(1) on success
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*/
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int ipfs_import_file(const char* fileName, struct Node** parent_node, struct FSRepo* fs_repo) {
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int retVal = 1;
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int bytes_read = MAX_DATA_SIZE;
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size_t total_size = 0;
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FILE* file = fopen(fileName, "rb");
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retVal = ipfs_node_new(parent_node);
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if (retVal == 0)
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return 0;
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// add all nodes
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while ( bytes_read == MAX_DATA_SIZE) {
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bytes_read = ipfs_import_chunk(file, *parent_node, fs_repo, &total_size);
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}
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fclose(file);
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return 1;
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}
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/**
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* called from the command line
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* @param argc the number of arguments
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* @param argv the arguments
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*/
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int ipfs_import(int argc, char** argv) {
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/*
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* Param 0: ipfs
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* param 1: add
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* param 2: filename
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*/
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struct Node* directory_node = NULL;
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struct FSRepo* fs_repo = NULL;
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// open the repo
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int retVal = ipfs_repo_fsrepo_new(NULL, NULL, &fs_repo);
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if (retVal == 0) {
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return 0;
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}
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retVal = ipfs_repo_fsrepo_open(fs_repo);
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// import the file(s)
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retVal = ipfs_import_file(argv[2], &directory_node, fs_repo);
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// give some results to the user
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int buffer_len = 100;
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unsigned char buffer[buffer_len];
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retVal = ipfs_cid_hash_to_base58(directory_node->hash, directory_node->hash_size, buffer, buffer_len);
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if (retVal == 0) {
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printf("Unable to generate hash\n");
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return 0;
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}
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printf("added %s %s\n", buffer, argv[2]);
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if (directory_node != NULL)
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ipfs_node_free(directory_node);
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if (fs_repo != NULL)
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ipfs_repo_fsrepo_free(fs_repo);
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return retVal;
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}
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