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2024-09-10 09:36:22 -06:00
parent 9bbaeab1ef
commit 06feae543a
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extraccion_html.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libpq-fe.h>
#include <libxml/HTMLparser.h>
#include <libxml/xpath.h>
// Define the alumno struct
struct alumno {
char apellido_paterno[100];
char apellido_materno[100];
char curp[20];
char clave_carrera[2];
char plan[2];
char clave[6];
char nombre[100];
char correo[100];
char estatus;
char telefono[11];
int semestre;
char sexo;
};
// Function to check for PostgreSQL connection errors
void check_conn_status(PGconn *conn) {
if (PQstatus(conn) != CONNECTION_OK) {
fprintf(stderr, "Connection to database failed: %s", PQerrorMessage(conn));
PQfinish(conn);
exit(EXIT_FAILURE);
}
}
// Function to check for PostgreSQL query execution errors
void check_exec_status(PGresult *res, PGconn *conn) {
if (PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr, "Query failed: %s", PQerrorMessage(conn));
PQclear(res);
PQfinish(conn);
exit(EXIT_FAILURE);
}
}
// Function to extract content from an HTML element by ID
char* get_element_content_by_id(htmlDocPtr doc, const char *id) {
xmlChar xpath[100];
snprintf((char *)xpath, sizeof(xpath), "//*[@id='%s']", id);
xmlXPathContextPtr xpathCtx = xmlXPathNewContext(doc);
xmlXPathObjectPtr xpathObj = xmlXPathEvalExpression(xpath, xpathCtx);
if (xpathObj == NULL || xmlXPathNodeSetIsEmpty(xpathObj->nodesetval)) {
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
return NULL;
}
xmlNodePtr node = xpathObj->nodesetval->nodeTab[0];
xmlChar *content = xmlNodeGetContent(node);
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
return (char *)content;
}
// Function to parse HTML content using libxml2 and populate the alumno struct
void parse_html(const char *html, struct alumno *alum) {
htmlDocPtr doc = htmlReadMemory(html, strlen(html), NULL, NULL, HTML_PARSE_NOERROR | HTML_PARSE_NOWARNING);
if (doc == NULL) {
fprintf(stderr, "Failed to parse HTML\n");
return;
}
char *content;
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_lblApPatAlumnoHP");
if (content) {
strncpy(alum->apellido_paterno, content, 100);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_lblApMatAlumnoHP");
if (content) {
strncpy(alum->apellido_materno, content, 100);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_lblCURPAlumnoHP");
if (content) {
strncpy(alum->curp, content, 20);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_Header1_lblCveCarrera");
if (content) {
strncpy(alum->clave_carrera, content, 2);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_Header1_lblAlupla");
if (content) {
strncpy(alum->plan, content, 4);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_Header1_lblCveUlsa");
if (content) {
strncpy(alum->clave, content, 7);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_lblNombreAlumnoHP");
if (content) {
strncpy(alum->nombre, content, 100);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_lblCorreoAlumnoHP");
if (content) {
strncpy(alum->correo, content, 100);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_Header1_lblStat");
if (content) {
alum->estatus = content[0];
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_lblTelefonoAlumnoHP");
if (content) {
strncpy(alum->telefono, content, 11);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_Header1_lblSem");
if (content) {
alum->semestre = atoi(content);
xmlFree(content);
}
content = get_element_content_by_id(doc, "ctl00_contenedor_HistorialAlumno1_lblSexoAlumnoHP");
if (content) {
alum->sexo = content[0];
xmlFree(content);
}
xmlFreeDoc(doc);
}
int main() {
// PostgreSQL connection parameters
const char *conninfo = "dbname=sgi user=postgres password=h3rcul3s#$ hostaddr=200.13.89.8 port=5432";
PGconn *conn = PQconnectdb(conninfo);
// Check connection status
check_conn_status(conn);
// Execute SQL query to retrieve HTML content
PGresult *res = PQexec(conn, "SELECT datos_html FROM public.alumno_extraccion WHERE error_message IS NULL");
check_exec_status(res, conn);
// Process each row
int rows = PQntuples(res);
for (int i = 0; i < rows; i++) {
char *html_content = PQgetvalue(res, i, 0);
// printf("HTML Content: %s\n", html_content);
struct alumno alum;
memset(&alum, 0, sizeof(alum)); // Initialize the struct to zero
parse_html(html_content, &alum);
printf("Apellido Paterno: %s\n", alum.apellido_paterno);
printf("Apellido Materno: %s\n", alum.apellido_materno);
printf("CURP: %s\n", alum.curp);
printf("Clave Carrera: %s\n", alum.clave_carrera);
printf("Plan: %s\n", alum.plan);
printf("Clave: %s\n", alum.clave);
printf("Nombre: %s\n", alum.nombre);
printf("Correo: %s\n", alum.correo);
printf("Estatus: %c\n", alum.estatus);
printf("Telefono: %s\n", alum.telefono);
printf("Semestre: %d\n", alum.semestre);
printf("Sexo: %c\n", alum.sexo);
}
// Clean up
PQclear(res);
PQfinish(conn);
return 0;
}